試題詳解

45.() The writer is considering revising the underined portion to the following: dioxide, which increases their acidity. Should the writer make this revision here?
(A) Yes, because it explains the relevance of this sentence to the point made in the paragraph.
(B) Yes, because it helps the reader understand why organisms near NW Rota-l
evolved the way they did.
(C) No, because it merely repeats information provided earlier in the passage without contributing to the paragraph's main idea.
(D)No, because it interrupts discussion of oceanic life-forms with an irrelevant detail.