The Region $\left\{ ( x + y ) \mid x \geq - 6,0 \leq y \leq e ^ { - x / 4 } \right\}$

Multiple Choice

The region $\left\{ ( x + y ) \mid x \geq - 6,0 \leq y \leq e ^ { - x / 4 } \right\}$ is represented below.
Find the area of this region to two decimal places. Select the correct answer.

A) $17.89$
B) $15.87$
C) $16.08$
D) $15.89$
E) $17.93$