The best way to deal with a "C" on a test.

It hurts. When it first happens. You cry. You sob. It rips a hole in your body, leaving a large gap where you used to be.

Anger, that abyss takes over.

Then, it does nothing. It just sits there, lonely and wishing you had some left with which to rip and shred.
Don't worry, the anger, pain, sadness, will subside. All that will be left is nothing, scratch.

And, what better way to erase the past, than to start from scratch with the present?