F=ma 2019 Part A Problem 13

A juggler juggles N identical balls, catching and tossing one ball at a time. Assuming that the juggler requires a minimum time T between ball tosses, the minimum possible power required for the juggler to continue juggling is proportional to

Answer Choices
A. N^{0}
B. N^{1}
C. N^{2}
D. N^{3}
E. N^{4}