Please help!! Which one is it?

A. Commutative property of addition looks like
a+b = b+a.
We can see that (-7/8) and 4/5 changed their places , so
we have Commutative Property of Addition here.
[tex]\frac{3}{5} + (-\frac{7}{8}) + \frac{4}{5} = \frac{3}{5} + \frac{4}{5} + (-\frac{7}{8})[/tex]
B. Addition property of equality (not this one)
if a=b, then a+c = b+c
C. Associative property of addition (not this one)
a+(b+c) = (a+b)+c
D. Identity property of addition. (not this one)
a+0=a
Answer is A.