The problem of free will is a dilemma. Which of the following best describes the problem?
a) Determinism is a challenge to our ordinary assumption that we are responsible for what we do
b) Indeterminism is is a challenge to the ordinary assumption that we are responsible for what we do
c) Whether determinism is true or not, it seems that we have no way to explain how free will could be possible
d) determinism is false.