In the following questions, four alternatives are given for the idiom / phrase underlined in the sentence. Choose the alternative which best expresses the meaning of the idiom / phrase and mark it in the Answer Sheet.

We must work with all our might and main, otherwise we cannot succeed.

A. full force

B. complete trust

C. exceptional skill

D. full unity

Please do not use chat terms. Example: avoid using "grt" instead of "great".