PLZZZZZZZ HELP ASAP!!!!!!!!!!!!!!!!!!

Read the passage:

He put house in order once more, got out his books, and prepared for a tussle with a difficult mathematical problem,

Which context clue helps you unlock the meaning of tussle?

A.You would assume that tussle is a synonym of books.

B.You would assume that tussle is a antonym of books.

C.You would assume that tussle is an antonym of problem.

D.You would visualize how you would feel when faced with a difficult math problem.