Perform the Indicated Operation Involving Rational Expressions $\frac { n r + 8 n - 8 r - 64 } { n r + 4 n + 4 r + 16 } \cdot \frac { n ^ { 2 } - 16 } { n ^ { 3 } - 8 n ^ { 2 } }$

Multiple Choice

Perform the indicated operation involving rational expressions. $\frac { n r + 8 n - 8 r - 64 } { n r + 4 n + 4 r + 16 } \cdot \frac { n ^ { 2 } - 16 } { n ^ { 3 } - 8 n ^ { 2 } }$

A) $\frac { n r - 4 r + 8 n + 32 } { m n + 4 n }$
B) $\frac { n r - 4 r + 8 n - 32 } { m ^ { 2 } + 4 n ^ { 2 } }$
C) $\frac { n r + 4 r + 8 n - 32 } { m ^ { 2 } - 4 n ^ { 2 } }$
D) $\frac { n r - 4 r + 8 n + 32 } { r ^ { 2 } + 4 n ^ { 2 } }$