Answer:
I think that he would be really happy that his plays are becoming movies.
The rest i am not sure what Shake spear would like or not. Also i dont know what the claim would be. sorry about that.
Explanation:
C is the right one. Unlike quotations or paraphrased ideas, information that's considered "common knowledge" doesn't need to be cited. "Common knowledge" is information that's considered widely known or easily verified.