During the Month of February, a Flu Epidemic Hit the University

During the month of February, a flu epidemic hit the University. The number of people sick at time t (measured in days) is given by the function P(t) . The rate at which the epidemic is spreading on February 3 is 110 people per day. How is the information best represented mathematically?

A) P'(3) = 110
B) $\frac { \mathrm { dP } } { \mathrm { dt } }$ $\mathrm { t } = 110$
C) $\frac { \mathrm { dP } } { \mathrm { dt } }$ $\mathrm { t } = 3$ = P'(3)
D) P(3) = 110
E) none of these