Translate the following mathematical expression into a written expression.
(ax b)2 + (c-d)
O A.
"The square of the product of a and b, plus the difference of c and d."
OB.
"The square root of the product of a and b, plus the difference of c and d."
OC.
"The square of the product of a and b, plus the sum of c and d."
OD.
"The square of the sum of a and b, plus the difference of c and d."