Answer:
C. Commutative Property of Addition
Explanation:
If a, b and c are any numbers,
According to,
Associative Property of Addition,
a + ( b + c ) = ( a + b ) + c
Associative Property of Multiplication,
a(bc) = (ab)c
Commutative Property of Addition
a + b = b + a
Commutative Property of Multiplication
ab = ba
Given,
4x + 2y = 2y + 4x
Hence, Commutative Property of Addition is used in the expression.
Option 'C' is correct.