Raise to the Power or Find the Root $\sqrt { 28 }$

Multiple Choice

Raise to the power or find the root. Assume that all variables represent positive real numbers. Write with only positive
exponents.
- $\sqrt { 28 }$

A) $7 \sqrt { 2 }$
B) $2 \sqrt { 7 }$
C) 5
D) 14