Answer: A. (1-1), (2-2), (3-3), (4-4), (5-5), (6-6)
Explanation:
Doubles are any pair of numbers where the outcomes are the same. There are 36 possible outcomes, and 6 of them are doubles since they have the same numbers. For example, (1-1), also known as snake eyes, are doubles since a 1 is rolled on each die. Therefore, the answer is A.