What is the simplified form of the expression (4x+4y)/(xy2)-:(3x+3y)/(x2y)?

A) (4x+4y)/(xy2)-:(3x+3y)/(x2y)
B) (4x+4y)/(xy2)-(3x+3y)/(x2y)
C) (4x+4y)/(xy2)+:(3x+3y)/(x2y)
D) (4x+4y)/(xy2)+(3x+3y)/(x2y)