anything else wrong with option E?

[sudaif]

[color=#0000BF]Is there anything else wrong with option E besides what the MGMAT explanation says? Specifically, is it okay to say "...previously costly..."[/color]

The invention of the cotton gin, being one of the most significant developments of the nineteenth century, had turned cotton cloth into an affordable commodity; it was costly before that.

E) being one of the most significant developments of the nineteenth century, turned cotton cloth from a previously costly commodity to an affordable one

MGMAt Explanation:
(E) The word "being" is unnecessary in the opening modifier.

[hannahyounis]

had! after the comma is my guess

[tim]

Yes. Also, the pronoun does not clearly point to the cotton cloth that it logically needs to refer to..