Simplify the Expression as Completely as Possible $$\left( - 3 w ^ { 4 } \right) \left( - 4 w ^ { 3 } \right)$$

Multiple Choice

Simplify the expression as completely as possible. $$\left( - 3 w ^ { 4 } \right) \left( - 4 w ^ { 3 } \right)$$

A) $- 5,184 w ^ { 7 }$
B) $12 w ^ { 12 }$
C) $12 w ^ { 7 }$
D) $7 w ^ { 12 }$
E) $- 12 w ^ { 12 }$