Hello Everyone!
Let's tackle this question, one item at a time, and narrow it down to the right choice! To start, here is the original question with the major differences between the options highlighted in orange:
November is traditionally the strongest month for sales of light trucks, but sales this past November, even when compared with sales in previous Novembers, accounted for a remarkably large share of total vehicle sales.
(A) but sales this past November, even when compared with sales in previous Novembers,
(B) but even when it is compared with previous Novembers, this past November's sales
(C) but even when they are compared with previous Novembers, sales of light trucks this past November
(D) so that compared with previous Novembers, sales of light trucks this past November
(E) so that this past November's sales, even compared with previous Novembers' sales,
There is a LOT you could focus on here, but if you look carefully, you'll notice that this is a COMPARISON question! Whenever we see 2 or more items being compared to each other, what do we focus on?
PARALLELISM!!
So - let's take a close look at each option, and make sure that the two things being compared are parallel in number, type, or wording style:
(A) but sales this past November, even when compared with sales in previous Novembers, --> PARALLEL
(B) but even when it is compared with previous Novembers, this past November's sales --> NOT PARALLEL
(First, it's unclear what the pronoun "it" is referring to. Even if it is referring to "this past November's sales," this sentence is still trying to compare sales to the actual month of November, which isn't the same thing.)
(C) but even when they are compared with previous Novembers, sales of light trucks this past November --> NOT PARALLEL
(Again, this sentence is trying to compare the sales of trucks in November to the months of November from the past. Those two things aren't parallel at all)
(D) so that compared with previous Novembers, sales of light trucks this past November --> NOT PARALLEL
(Yet another case of trying to compare months to sales, which are not parallel!)
(E) so that this past November's sales, even compared with previous Novembers' sales, --> PARALLEL
We can eliminate option B, C, & D because they create non-parallel comparisons!
Now that we have this narrowed down to only 2 options, let's take a closer look at each option and see if we can find any other problems:
(A) but sales this past November, even when compared with sales in previous Novembers,
This is CORRECT! It is a parallel comparison, and the conjunction "but" creates a strong contradiction for the reader.
(E) so that this past November's sales, even compared with previous Novembers' sales,
This is INCORRECT because the phrase "so that" is misleading and changes the meaning. By using the cause-effect conjunction "so that," the sentence now suggests that November is the strongest month for selling light trucks, which leads to sales in the past being larger? That doesn't make sense, does it? Let's rule this out because the conjunction "so that" is the wrong one for this situation.
There you have it - option A was the right choice all along!
Don't study for the GMAT. Train for it.