Simplify Express Final Results Using Positive Exponents Only $\left( 7 x ^ { \frac { 1 } { 8 } } \right) \left( 6 x ^ { \frac { 7 } { 8 } } \right)$

Multiple Choice

Simplify. Express final results using positive exponents only. $\left( 7 x ^ { \frac { 1 } { 8 } } \right) \left( 6 x ^ { \frac { 7 } { 8 } } \right)$

A) $42 x ^ { \frac { 1 } { 8 } }$
B) $7 x$
C) $42 x$
D) $42 x ^ { 2 }$