Final answer:
Among the options provided, A. {3, 5, 7} is the finite set as it contains a limited number of elements.
Step-by-step explanation:
The student asked which of the following is a finite set: A. {3, 5, 7} B. {... ,-3 ,-2 ,-1, 0, 1, 2} C. Set of prime numbers. A finite set is one that has a limited number of elements.
Option A is a finite set because it contains only three elements. Option B is not a finite set as it implies an infinite sequence of numbers continuing indefinitely in both directions. Option C, the set of prime numbers, is also not finite because prime numbers continue infinitely. Therefore, the finite set among the options given is A. {3, 5, 7}.