A. Incorrect
B. Incorrect
C. Correct
D. Incorrect
E. Incorrect
C. 20x + 8y is the correct answer because the parentheses indicate that you would need to multiply. Using the distributive property, you would multiply 4 by 5x which is 20x and 4 by 2y which is 8y. So, your answer is C. 20x + 8y