Its DBC, cause two is in that point so you just find the answer choice with those three letters in the right order.
Mean
add up numbers and divide by how many there are
(1+1+5+3+6+6)/7=3 and 2/3
Answer:
commutative property is C+2+0=C+2
(As a+b=b+a is the law of commutative property of addition )