The twin getting a C is using a fixed mindset. Just because your twin gets a better grade does not make you dumber it means you may need a different approach at what you are doing.
when i wake up in the morning i look around and say man my room is a mess. I get up and start cleaning then i stop and think "im to young for this" so I call my mom to tell her to clean it? does this happen to you? hope this helps?!
I think the answer are A & B.
