Simplify the Radical Expression $\sqrt { 28 }$ A) $2 \sqrt { 7 }$

Multiple Choice

Simplify the radical expression. Assume that all variables represent positive real numbers.
- $\sqrt { 28 }$

A) $2 \sqrt { 7 }$
B) $\sqrt { 28 }$
C) $4 \sqrt { 7 }$
D) 14