PASCAL 2020 Problem 15

In the diagram, the large square has area 49, the medium square has area 25 , and the small square has area 9 . The region inside the small square is shaded. The region between the large and medium squares is shaded.

Image

What is the total area of the shaded regions?

Answer Choices
A. 33
B. 58
C. 45
D. 25
E. 13