Answer: A. 41 sq units.
Explanation:
The whole figure can be divide into two shape which is a square and a right triangle.
This can be created by drawing a straight line from C horizontally to the other end.
The square will have a side length of 4 .
The right triangle will have a base of 5 and a height 10.
So using this we could find the area of the square and add it to the area of the right triangle.
Area of Square: A= 4^2
A = 16
Area of right Triangle.: A= BH/2
A= 5 * 10/2
A = 50/2
A= 25
Total: 25 + 16 = 41 square units.