GMAT Sentence Correction (SC) | Re: RATT Race: The West African lungfish uses their

Solution to problem #1: West African Lungfish
Correct answer: C

(A) Incorrect
Singular vs. Plural: The word fish can be both singular and plural. In the original sentence, the singular verb uses signals that the word lungfish is singular, but the plural pronouns their and they signal that the word lungfish is plural. Both can’t be true at the same time, so the original sentence is incorrect.
Modifier: The adverbial modifier surviving long periods of dormancy logically follows from the lungfish’s