Which of the Following Would Make a Player More Inclined

Which of the following would make a player more inclined to continue into later stages of the Centipede Game rather than ending the game immediately? (Choose all that apply.)

A) The subgame-perfect equilibrium is to continue as long as possible because the payoffs eventually get much larger.
B) An increase in the chance that your rival has difficulty performing a long chain of deductions.
C) An increase in the chance that your rival believes you have difficulty solving a long chain of deductions.
D) Altruism toward one's rival.