Official Explanation:Read the Original Sentence Carefully, Looking for Errors:
There is a nonparallel construction in this sentence because two things are being equated, with the word "is," but the two things are not expressed in the same form. The two parts of the sentence that must be parallel are "to portray" and "following in."
Scan and Group the Answer Choices:
(A), (B), and (C) begin with "and," which continues the direction of the sentence, while (D) and (E) use "but," which sets up a contrast in direction.
Eliminate Wrong Answer Choices:
Choice (A) is incorrect based on the parallelism error identified above.
The original meaning of the sentence does not support a contrast, so (D) and (E) can be eliminated.
(B) doesn't make the construction parallel because it doesn't change "following" to "to follow." In any case, the switch to a past tense verb doesn't make sense.
(C) makes the two parts of the sentence parallel by substituting "to follow in" for "following in." This is the correct answer.
TAKEAWAY: Even though an answer choice may fix the original sentence's grammatical error, if it changes the sentence's meaning, it's wrong.