C.
84 square inches.
Step 1-- Break up the figure into smaller parts.
Step 2-- Find the area of each part.
Figure 1: A = length (base) × width (height)
A = l× w
A = 6*6
A = 36 sq inch
Figure 2:
A = length (base) × width (height)
A = l× w
A = 6*8
A = 48 sq inch
Step 3 Add the areas.
The area is 36 +48 or 84 square inches