Guess+the+answers?

Cheyenne dicided to guess the answers on her homework. She wrote down any answer that either looked right or sounded right. She ended up geting a 100% on her homework. Cheyenne feels bad because she thinks she didn't learn anything from this. she thinks she should tell her teacher about it. Then she thinks about how mad she might be too. Well what should Cheyenne do?

Tell her teacher or     keep it to herself