Perform the Indicated Operations $$\frac { 42 a ^ { - 2 } b ^ { 4 } } { 6 a ^ { - 8 } b ^ { 7 } }$$

Multiple Choice

Perform the indicated operations. Write the result using only positive exponents. Assume all variables represent nonzero
real numbers.
- $$\frac { 42 a ^ { - 2 } b ^ { 4 } } { 6 a ^ { - 8 } b ^ { 7 } }$$

A) $\frac { 7 a ^ { 6 } } { b ^ { 3 } }$

B) $- \frac { a ^ { 5 } } { 7 b ^ { 4 } }$

C) $- 7 a b ^ { 2 }$

D) $\frac { 7 b ^ { 4 } } { a ^ { 6 } }$