Perform the Indicated Operations $- 4 \sqrt { 2 } - 7 \sqrt { 2 }$

Multiple Choice

Perform the indicated operations.
- $- 4 \sqrt { 2 } - 7 \sqrt { 2 }$

A) $3 \sqrt { 2 }$
B) $28 \sqrt { 4 }$
C) $- 11 \sqrt { 4 }$
D) $- 11 \sqrt { 2 }$