The most possible answer is B- an uppercase letter because a point is pointed towards the highest elevation and back to the lowest elevation making the highest elevation an uppercase and the lowest elevation an uppercase. For example, lowest elevation would be B whilst highest elevation is H. That would make it (A,H). Unless you were doing a negative point but nobody uses those these days.
The volume of the rectangular prism is equal to length times width times height. Since length and width are equal, the formula includes the squaring of the length. after substitution, the formula is 9^2 * 5 equal to 405 m^3.
