Mark the letter

Câu hỏi: Mark the letter A, B, c orD on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions.
“It is a really difficult matter to decide how to solve now. I will need time to think it over”.

A. to sleep on it

B. to makc it better

C. to make up for it

D. to think out of time