The commutative property in math is where numbers that you operate can swapped from their position without changing the answer.
For example 4 + 3 = 7 and 3 + 4 = 7
The associative property in math is where you can add or perform product regardless of how the numbers are grouped. For example;
a +{ b+ c} ={ a+b} + c -----the same applies in product
So in this case,
2/5 - 15 + 8 - 1/5 + 3 -----
In A ;
[2/5 -15 ] + [8-1/5] + 3 -------we notice the grouping is the same as that of the question.No changes. Even in applying the commutative property the order is the same as that in question