Select the most appropriate option that can substitute the underlined segment in the following sentence.
This serum contains ingredients enabling the hair to grow.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. that enable the hair to grow.
"That enable" introduces a defining relative clause, giving essential information about the ingredients.
"Enabling" is a participle (verb + -ing) which doesn’t connect clearly to "ingredients" in this context.
"Ingredients" is plural, so the verb should match: "enable" (not "enables").
Hence, the correct sentence is:- This serum contains ingredients that enable the hair to grow."