The correct option is B 25
Since Stacey wants to bake the same number of cookies for her 5 friends, the number of cookies she should bake should be a multiple of 5.
17, 12, and 2 are not multiples of 5 since no two factors of 17, 12, or 2 can be multiplied in order to obtain 5.
However, 25 is a multiple of 5 since 5 × 5 = 25
Thus, Stacey should bake 25 cookies.