Which sentence demonstrates correct subject and verb agreement

Your answer will be C, the grains of sand slip through my fingers.

This is because if you were to say any other sentence out loud, it wouldn't make that much sense.

For instance, on the second one, you wouldn't just have one grain of sand, same with the last one, and on the first one, saying "slips" wouldn't make sense.

C is the answer!

Explanation: Who else hates homework but love k12

be more specific with your question.