Which of the following is true? A. The ratio of the change in volume of a sphere with the change in its radius is equal to its surface area. B. For any solid figure, the change in surface area will...

Which of the following is true?

A. The ratio of the change in volume of a sphere with the change in its radius is equal to its surface area.

B. For any solid figure, the change in surface area will always greater than its change in volume.

C. The rate of change of the distance function of a moving body provides its speed function.

D. The value of the voltage drop with respect to time can be determined only when one of the three unknown variables are given certain values. ( The general equation for voltage is V= lR).

E. None of these.