Multiple choice

A careful perusal of the history of the evolution of whales reveals that they were not always complete sea dwellers but evolved slowly from amphibian ancestors.

  1. reveals that they were not always complete sea dwellers but evolved slowly

  2. reveals that the whales were not always complete sea dwellers but evolved slowly

  3. reveals that the whales had not always been complete sea dwellers but evolved slowly

  4. reveals that the whales had not always been complete sea dwellers but had evolved slowly

  5. revealed that they had not always been complete sea dwellers but evolved slowly
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Correct. The option removes the error of missing antecedent by using 'whales' instead of 'they'. Also, the option removes the error of Tense Usage by using Past Perfect to report an event (whales being amphibians/ were not complete sea dwellers) that took place before the evolution of whales into sea mammals.

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