Abook club has 10 members. how many ways can they choose a president, vice president, and secretary from among the members?

        A.
30

B.
120

C.
720

D.
100                                                                                                                                                                                                                                                                720 possible combinations if each post is held by one person.
90 possible combinations if one person can have two positions.
10 possible combinations if one person can hold all three.