Answer:
C. (5-1), (5-2), (5-3), (5-4), (5-5), (5-6)
Explanation:
So let's look at the choices and find which one has only one 3 (3's will be boldened for convenience).
A. (1-1), (2-2), (3-3), (4-4), (5-5), (6-6)
A has two three's, so it's out.
B. (1-3), (2-3), (3-1), (3-2), (3-4), (3-5), (3-6), (4-3), (5-3), (6-3)
B has 10 three's, so it's also out.
C. (5-1) (5-2) (5-3) (5-4) (5-5) (5-6)
C has 1 three, so it's correct. However I will still test D to make sure.
D. (1-6) (2-5) (3-4) (4-3) (5-2) (6-1)
D, like A, has two three's, so it's out.
With that information, we can deduce that C has the favorable outcomes for rolling exactly 1 three.