Choose the grammatically correct relative clause construction: 'She is one of those rare researchers who _____ dedicated their entire careers to marine biology.'

Answer and explanation

Correct answer: C. have

  1. Step 1: In the construction 'one of those [plural noun] who', the relative pronoun 'who' refers to the plural antecedent 'researchers'. Step 2. Therefore the relative clause requires the plural verb 'have'. Answer: have. Why not the others: 'has' incorrectly treats 'one' as the antecedent; 'was' and 'is' are singular and mismatch the perfect aspect.

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