What Is the Solution of This Initial Value Problem:
$y=e^{3 t}\left[3 \cos (7 t)-\frac{4}{7} \sin (7 t)\right]$

Multiple Choice

What is the solution of this initial value problem:

A) $y=e^{3 t}\left[3 \cos (7 t) -\frac{4}{7} \sin (7 t) \right]$
B) $y=e^{-3 t}(3 \cos (7 t) +2 \sin (7 t) )$
C) $y=e^{7 t}\left(3 \cos (3 t) +\frac{14}{3} \sin (3 t) \right)$
D) $y=e^{-7 t}\left[3 \cos (3 t) -\frac{4}{3} \sin (3 t) \right]$