The correct answer is C. matters.
The saying “It is not what you say that matters, but what you do” means that actions speak louder than words. In other words, what you do is more important than what you say. This is because people can say a lot of things, but it is their actions that show what they really mean. If you want to be taken seriously, it is important to back up your words with actions.
Option A, matches, is incorrect because it does not capture the meaning of the saying. The saying is not about whether or not your words match your actions. It is about whether or not your actions matter.
Option B, implies, is incorrect because it does not capture the meaning of the saying. The saying is not about what your words imply. It is about what your actions matter.
Option D, moves, is incorrect because it does not capture the meaning of the saying. The saying is not about whether or not your words or actions move people. It is about whether or not your actions matter.