Question

noredink pronoun - antecedent agreement quiz question 11 of 20 fix the pronoun error (if one exists). wkabi jumped on all of the mattresses to test how bouncy it was.

Explanation:

The antecedent "all of the mattresses" is plural, so the pronoun should be plural too.

Answer:

W'Kabi jumped on all of the mattresses to test how bouncy they were.