Hello, your answer would be <u><em>C, Shining with many colors. </em></u>
The correct answer is <span>a. Even the adults were jumping and splashing like children, who usually don't play much.
The clause "who usually don't play much" refers to adults and not children. Here however, due to misplacement, it makes it seem as if the children are the ones who don't play much.</span>
Winter is fast approaching = indicative
hope I helped !