Simplify (Assume All Variables Are Nonzero $$\frac { ( a - 3 b ) ^ { 15 } } { ( a - 3 b ) ^ { 5 } }$$

Multiple Choice

Simplify. (Assume all variables are nonzero.)
- $$\frac { ( a - 3 b ) ^ { 15 } } { ( a - 3 b ) ^ { 5 } }$$

A) $( a - 3 b ) ^ { 75 }$
B) $( a - 3 b ) ^{10}$
C) $( a - 3 b ) ^ { 3 }$
D) $( a - 3 b ) ^ { 20 }$