Simplify the Expression $2 \sqrt { 10 } + 14 \sqrt { 10 }$

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $2 \sqrt { 10 } + 14 \sqrt { 10 }$

A) $13 \sqrt { 10 }$
B) $- 17 \sqrt { 10 }$
C) $16 \sqrt { 10 }$
D) $- 12 \sqrt { 10 }$