THE CORRECT ANSWER IS (B). IN THE UNDERLINED PART, THE THREE LISTED...
2. The correct answer is (B). In the underlined part, the three listed items are not
grammatically parallel. Choice (B) solves the problem by omitting the word its. Choices
(D) and (E) also fix the faulty parallelism. However, choice (D) omits the word other,
thereby implying that museums and libraries are not cultural institutions—which they
are, of course, as the original sentence points out—while choice (E) is unnecessarily
wordy.