High School

What is the correct numerical expression for "multiply the sum of 7 and 6 by the sum of 4 and 5?"

A. 7 + 6 x 4 + 5
B. (7 + 6) x (4 + 5)
C. 7 + (6 x 4) + 5
D. 7 + 6 x (4 + 5)