Simplify the Expression $( \sqrt { 11 } + 4 ) ( \sqrt { 11 } - 4 )$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $( \sqrt { 11 } + 4 ) ( \sqrt { 11 } - 4 )$

A) $11 - 2 \sqrt { 4 }$
B) 7
C) 27
D) $- 5$