Perform the Indicated Operations Using the Laws of Exponents $10 ^ { - 18 } \cdot 10 ^ { 15 }$

Multiple Choice

Perform the indicated operations using the laws of exponents. Express the result using positive exponents. $10 ^ { - 18 } \cdot 10 ^ { 15 }$

A) $10 ^ { 33 }$
B) $10 ^ { 36 }$
C) $10 ^ { 3 }$
D) $\frac { 1 } { 10 ^ { 33 } }$
E) $\frac { 1 } { 10 ^ { 3 } }$