Your company maintains a cylindrical oil refinery storage tank that is 190 feet across on the inside and 80 feet high. The tank is now 75% full of crude oil. You have calculated that it contains about 35, 800 cubic feet of crude oil. What error, if any, did you make in your calculations?

A. You multiplied that tank's radius by two instead of calculating r^2
B. You squared the tank's diameter instead of its radius
C. You did not take 75% of the tank's total volume
D. You forgot to multiply by the tank's height.
E. There was no error in your calculations.