Multiply and Simplify $$a ^ { - 6 } \cdot a ^ { 6 }$$

Multiple Choice

Multiply and simplify.
- $$a ^ { - 6 } \cdot a ^ { 6 }$$

A) 0
B) $- 1$
C) 1
D) $\frac { 1 } { a ^ { 6 } }$