Simplify the following expression.
(28x - 7y) + (32x + 52y)
A21x + 45y
B60x + 45y
C60x + 59y
D21x + 59y
(28x - 7y) + (32x + 52y)
A21x + 45y
B60x + 45y
C60x + 59y
D21x + 59y