Multiple choice

Directions: Choose the grammatically correct phrase from the given options for the underlined phrase.

Scientists at the Salk Institute for Biological Studies in America found that active mice demonstrate a greater ability to learn, suggesting that exercise increases brain chemicals that make it more resilient to cognitive decline.

  1. that make it more resilient to cognitive decline

  2. that makes it more resilient to cognitive decline

  3. that make them more resilient to cognitive decline

  4. that makes them more resilient to cognitive decline

  5. that make it most resilient to' cognitive decline
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pronoun 'them' refers to 'chemicals' (plural), so 'make them' is correct. The original 'make it' incorrectly refers to a singular noun.

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