Perform the Indicated Operations $$\left( 81 \mathrm { k } ^ { 4 } \mathrm {~m} ^ { - 8 } \right) ^ { 1 / 4 }$$

Multiple Choice

Perform the indicated operations. Write the answer using only positive exponents. Assume all variables represent
positive real numbers.
- $$\left( 81 \mathrm { k } ^ { 4 } \mathrm {~m} ^ { - 8 } \right) ^ { 1 / 4 }$$

A) $\frac { 3 k } { m ^ { 2 } }$
B) $3 \mathrm {~km} ^ { 2 }$
C) $\frac { 4 k } { m ^ { 2 } }$
D) $4 \mathrm {~km} ^ { 2 }$