Hard SC Q re: Misplaced Modifier, Parallelism, Separate Objs

[RonPurewal]

also, in A, why didn't we make a list of 4 things?
A) Examples include speculative bubbles in South Seas trading rights in the 1720s, Victorian real estate in the 1880s, the U.S. stock market in the 1920s, and the obsession for Beanie Babies in the 1990s.

this is why you have to SLOW DOWN and UNDERSTAND WHAT THE SENTENCE IS SAYING.

the examples include...
...speculative bubbles in X, Y, and Z
AND
...the obsession with BB

it's not a list of four things -- it's a list of two things (speculative bubbles... and obsession...). the first of those two things has 3 components.

if you try to make this into a list of 4 things, you'll find that the word "obsession" has nowhere to go.

[RonPurewal]

also in B, Examples include SOMETHING, which were all the past tense like 1720s, 1880s, and 1920s, as well as 1980s. Here, every list is from past event. So, why we use INCLUDE here. Shouldn't it be INCLUDED?

examples still include these things.
examples will include these things forever and ever. ("included" would only make sense if these things STOPPED being included as examples of the term at some point in the past.)

[AsadA969]

Hi Ron,
in option A and B, it is said:
A) a term coined from the tulip craze of the seventeenth-century
B) a term coined from the seventeenth-century tulip craze

what is the basic difference between above two versions?

nothing, really.
the first one shouldn't contain a hyphen, but that's probably a transcription mistake on the part of whoever posted the problem here.

B. Examples of "tulipomania," a term coined from the seventeenth-century'S tulip craze in the Netherlands, include speculative bubbles in South Seas trading rights in the 1720s, Victorian real estate in the 1880s, and the U.S. stock market in the 1920s, as well as
in B, can we use apostrophe (') like the above one?
i want to mean: is it seventeenth-century tulip craze or seventeenth-century'S tulip craze?
Thanks Ron...

[RonPurewal]

no, that wouldn't work, but that kind of thing isn't tested on the exam.

__

DO NOT 'make your own versions' of GMAC's sentences.
really.
don't do it.

the GMAT only tests about 1% of the things that can actually go wrong with english sentences (and even that is probably an overestimate).
when random users try to 'edit' these sentences, the result is almost always inferior or incorrect—for reasons that the GMAT doesn't test.

making your own examples is good, but they should be...
...1/ your own examples,
...2/ SIMPLE examples, each illustrating only ONE concept (that is actually tested on this exam).

as far as the official problems are concerned, the given answer choices should be challenging enough already.
(:

[AsadA969]

DO NOT 'make your own versions' of GMAC's sentences.
really.
don't do it.

Ron, i've no intention to make my own version of any GMAC's sentences. i've written that one because i thought that an apostrophe (') is missing in this sentence. i've written it to know more about it though it is not tested in real GMAT.

here are two versions, which make me confused to pick it up.
i've got a message from Manhattan prep instructor Ron Purewal about GMAC's sentence correction in this forum toady.
i've got a message from Manhattan prep'S instructor Ron Purewal about GMAC's sentence correction in this forum toady.
can you please help me to pick up the correct one?

also in the following:
DO NOT 'make your own versions' of GMAC sentences.
DO NOT 'make your own versions' of GMAC's sentences.
i want to write correct sentence in all the times though the use of apostrophe (') is not tested in GMAT.
Thanks...

[RonPurewal]

this is a GMAT forum; this is not the place to discuss things that are irrelevant to the GMAT exam.