Your friend recently entered a few chess competitions but lost them all badly. Which of the following statements is he most likely to make if he possesses an incremental theory of self?

a."I just wasn't born with the right cognitive abilities for chess."
b."I should forget all of my past matches and start fresh."
c."I lost because I didn't play using the right chess board."
d."I think my competitor cheated."
e."I can work even harder to improve and correct my weaknesses."