In the diagram, square ABCD has a side length of 4. What is the total area of the shaded regions?

**Answer Choices**

A. 4

B. 8

C. 9

D. 12

E. 16

In the diagram, square ABCD has a side length of 4. What is the total area of the shaded regions?

**Answer Choices**

A. 4

B. 8

C. 9

D. 12

E. 16