How many ways can 10 anchors who try out for a play fill the 4 roles

Tell whether the situation is a permutation or combination. Then solve.How many ways can 10 anchors who try out for a play fill the 4 roles?

a. C, 210 ways
b. P5040 ways
c. P3024 ways
d. C126 ways

Permutation (since each role is different)

10 * 9 * 8 * 7 = 5040 (B)