40) Consider the steps to simplify the expression. What property of operation is used in Step 2? Expression: -4% +7-34

Step 1: = -47+7+43 (-34)
Step 2:= -45
Step 3: = 4+ (3)+(-3)+(-7)+7
Step 4:= -4 +63)+(-7)+(-3) +7 +7
Step 5:= -4 + (-1) + (-3) + 7
Step 6: = -8 +7
Step 7: = -1

A) Apply the associate property of addition,

B) Apply the commutative property of addition.

C)The opposite of a sum is the sum of it's opposites.

D) Subtracting a number is the same as adding the inverse.​