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.​