A Population Is Increasing According to the Exponential Function Defined $y = 3 e ^ { .04 x }$

A population is increasing according to the exponential function defined by $y = 3 e ^ { .04 x }$ , where $y$ is in millions and $x$ is the number of years. Which of the following should be done in order to answer the question "How large will the population be in 3 months?"

A) Solve $3 e ^ { .04 x } = 3$ .
B) Solve $3 e ^ { .04 x } = 1 / 4$ .
C) Evaluate $\mathrm { y } = 3 \mathrm { e } ^ { .04 ( 1 / 4 ) }$ .
D) Evaluate $y = 3 e ^ { .04 ( 3 ) }$ .