Which sentence uses a verb that agrees with its compound subject? a. a screwdriver and wrench is necessary for this project. b. the sisters and their brother has arrived from karate practice. c. both charlie and arthur looks too tired for another game. d. he and his team approve of the decision i made.

Well, let me write the correct versions, and see which one does not need a correction:
A. A screwdriver and wrench ARE necessary for this project.

B. The sisters and their brother HAVE arrived from karate practice.

C. Both Charlie and Arthur LOOK too tired for another game.

D. He and his team approve of the decision I made.
- yes, no correction needed! so in this case the verb agrees with the subject.

So far i know that you cant