Suppose $F = g(w)$ is the force, in Newtons, on a rocket when the wind speed is $w$ meters per second and $a(F)$ is the acceleration, in meters per second squared, when the force is $F$ Newtons.

Which of the following statements best explains the meaning of the composite function $a(g(w))$?

A. The acceleration function $a$ of the force and the wind speed.
B. The wind speed $w$ when the acceleration of the rocket is $a$ meters per second squared.
C. The acceleration $a$ of the rocket, in meters per second squared, when force is $F$ Newtons.
D. The acceleration $a$ of the rocket, in meters per second squared, when the wind speed is $w$ meters per second.
E. None of the above