Actor Out the Greatest Common Factor $20 w x-12 w y-16 w z$

actor out the greatest common factor. Simplify the factors, if possible
- $20 w x-12 w y-16 w z$

A) $4 w(5 x-3 y-4 z)$
B) $20 w(x-12 y-16 z)$
C) $4(5 w x-3 w y-4 w z)$
D) $4 w(5 x-12 w y-16 w z)$