Which of the following represents the difference quotient for f of x is equal to 3 over x question mark a 3 over the quantity x times the quantity x plus h end quantity b negative 3 over the quantity x times the quantity x plus h end quantity c the quantity 3 times x plus h end quantity over the quantity x times h times the quantity x plus h end quantity d negative of the quantity 3 times x minus h end quantity over the quantity x times h times the quantity x plus h end quantity