Perform the Indicated Operations Using the Laws of Exponents $10 ^ { - 6 } \cdot 10 ^ { - 4 } \cdot 10 ^ { 3 }$

Multiple Choice

Perform the indicated operations using the laws of exponents. Express the result using positive exponents. $10 ^ { - 6 } \cdot 10 ^ { - 4 } \cdot 10 ^ { 3 }$

A) $10 ^ { 72 }$
B) $\frac { 1 } { 10 ^ { 7 } }$
C) $\frac { 1 } { 10 ^ { 13 } }$
D) $10 ^ { 13 }$
E) $10 ^ { 7 }$