How will the right answer fit in terms of support and conclusion?

Only the right answer will use the same kind of support and the same kind of conclusion as the passage.

Highlight the main conclusion in the passage, if there is one:

a higher proportion of full-length science-fiction films than of short documentary films are commercially successful.

[SUPPORT], even though [SUPPORT]. Therefore, [CONCLUSION].

The right answer will have to match the comparison in the passage. It will also have to make a “proportion”-al conclusion based on two pieces of support about what’s “smaller” and what there’s “more” of.

Map the wording of the answers to the wording of the passage:

(A) …have freestanding bathtubs. Hence…

This is where the second piece of support with something like “even though” should go, but it’s not here.

(B) A greater number of…, even though there are more… Thus, a higher proportion…

It’s the same two pieces of support leading to the same comparison in the conclusion. And “large Victorian” versus “modern apartments” with “freestanding bathtubs” matches the “short” versus “full-length” films that are “commercially successful” in the passage.

(C) For even though…

It’s a little word, but a big catch. That’s like “because”, indicating that the first sentence in this thing is the main conclusion. Order doesn’t matter, but in the passage the conclusion is the “proportion” statement. And this conclusion doesn’t match.

(D) …so there are more…, since a higher percentage…

The “so” makes a conclusion out of what wants to be the second premise. Aaand the “since” turns what should be the conclusion into support.

(E) …even though there are fewer modern apartments…

Ugh, gotta check details carefully here to be sure. It wants to say “even though there are more modern”. If it’s “smaller” and “fewer”, that’s what we would expect, so “even though” here makes no sense.

(B) is the correct answer.

Common pattern/s in this question: There can be a lot of details to keep track of, but recognizing the comparison structure helps make sure your process never loses its basic focus.