Amy and Stephanie were playing a number game. Amy picked a number and told Stephanie that if she added 9 to the number and multiplied the sum by 4, it would equal 16. Which equation could Stephanie use to find the number, x?

A.
4(x) + 9 = 16

B.
4(x + 9) = 16

C.
4 + (x + 9) = 16

D.
9(x + 4) = 16