Answer:
Option B,

Explanation:
Step 1: Determine the area of the back



Step 2: Determine the hypotenuse
Pythagorean theorem →






Step 3: Determine the area of the top



Step 4: Determine the area of the front



Step 5: Determine the area of the bottom



Step 6: Determine the area of the trapezoid




Step 7: Determine the total surface area


Answer: Option B,
