Solve $\frac { d N } { d t } = 4 - 0.2 N$

Multiple Choice

Solve $\frac { d N } { d t } = 4 - 0.2 N$ , with N(0) = 0.

A) $N = 20 e ^ { - 0.2 t }$
B) $N = 4 \left( 1 - e ^ { - 0.2 t } \right)$
C) $N = 4 \left( e ^ { - 0.2 t } - 1 \right)$
D) $N = 20 \left( 1 - e ^ { - 0.2 t } \right)$