Eight horses are entered in a race. In how many ways can they cross the finish line if ties are not allowed?

a. 8^ 8
b. 8*7*6*5*4*3*2
c. 2^ 8
d. 8
e. none of the above

I thought the answer would be "b." but there isn't a *1 at the end of it to make it P(8,8)