PLS HELP I NEED THE ANSWER

Answer:
1.C
2.B
Step-by-step explanation:
Property of Addition
Commutative Property
1 + 2 + 3 = 3 + 2 + 1
Associative Property
(3 + 1) + 2 = 3 + ( 1 + 2)
Identity Property
3 + 0 = 3