Indicate which property is illustrated in Step 6.Step 19 + 11x - 9 - 4x + 2=9 + (11x - 9) - 4x + 2Step 2=9 + (-9 + 11x) - 4x + 2Step 3=[9 + (-9)] + (11x - 4x) + 2Step 4=0 + (11x - 4x) + 2Step 5=(11x - 4x) + 2Step 6=(11 - 4)x + 2Step 7=7x + 2 A. additive inverse B. commutative C. associative D. distributive