Answer:
Base #2
Explanation:
For this question, we need to find the base that's volume is a factor of 60.
Base #1 Volume = 7 * 3 or 21
21 is not a factor of 60, so it cannot be the base.
Base #2 Volume = 5 * 3 or 15
15 is a factor of 60, so it is the base.