75, 65, 85, 55, 45, 85, 35, … choose which pair of numbers comes next?

The answer is $\boxed{\text{A. }25, 15}$.

In this sequence, each number is 10 less than the number before it, except for every third number, which is repeated. Therefore, the next number in the sequence is 10 less than 35, which is 25. The number after that is 10 less than 25, which is 15.

Here is a table showing the sequence:

Number | Explanation
——- | ——–
75 | Starting number
65 | 10 less than 75
85 | Repeated number
55 | 10 less than 65
45 | Repeated number
85 | Repeated number
35 | 10 less than 45
25 | 10 less than 35
15 | 10 less than 25