Chris promises dina $40,000 if she graduates from eagle college. dina enrolls in eagle, attends full-time for four years, and graduates. when dina asks chris for $40,000, chris says, "i don't re¬member promising you $40,000. but if there was a promise, it's not en¬forceable, because we didn't bargain for it. and even if there was a prom¬ise that would otherwise be enforceable, i revoke it now." can dina en¬force chris's "prom¬ise"? why or why not?
