The correct answer is B

Explanation

The mathematical expression given in the question is (8 times x) + (2 times x) minus 5, which is equivalent to (10 times x) minus 5. The expression (10 times x) minus 5 can be factored as 5 times ((2 times x) minus 1). For every positive integer x, 5 times ((2 times x) minus 1) must be a multiple of 5. If x = 1, then 5 times ((2 times x) minus 1) = 5, which is not an integer multiple of 2, 8, 10, or 15. Therefore, the correct answer is 5.