3. a company's managers - isn't it confusing, whether "a" is referring to company or manager and could be the basis of elimination, thinking "a" is referring to "managers".
hm? i don't understand.
in any case, there are at least four things wrong with this query.
• first, "a"/"an"/"the" is NEVER tested on this exam. so, this whole line of questioning is rather pointless in the first place, at least for any purpose related to this exam.
• second, "a" is singular while "managers" is plural, so there is no way they could be associated.
• third, the meaning of the sentence is clear in context; there is no ambiguity.
• fourth, if you have "a/an x's y", the "a/an" is necessarily associated with "x" anyway.
it can't be associated with "y" (regardless of singular/plural issues), because "y" is already preceded by a possessive. (we can't say "his a/an xxxx".)
the only exception occurs if the possessive has evolved into the name of something. (e.g., a "tailor's ham" is the name of something that weighs down fabric during sewing. that's the name of the object. so, if i say "i want a tailor's ham", i am not asking for meat that belongs to a tailor.) however, you will obviously not be expected to know any such conventions here.