Pllzzzz help i am timed

1. name the property illustrated (8+6)+4=8+(6+4)

(a) opposite of a sum property
(b) associative property of addition
(c) commutative property of addition

2. name the property illustrated -(-3+6)=3+(-6)
(a) opposite of a sum property
(b) associative property of addition
(c) commutative property of addition

3. name the property illustrated -8+(14)= 14 +(-8)
(a) opposite of a sum property
(b) associative property of addition
(c) commutative property of addition