Simplify the Rational Expression $c = 25 ( n + 49 ) ^ { 1 / 2 }$

Multiple Choice

Simplify the rational expression. Use factoring, and assume all variable expressions represent positive real numbers.
-The cost of manufacturing clocks is given by c $c = 25 ( n + 49 ) ^ { 1 / 2 }$ , where c is the cost in dollars and n is the number produced. What is the cost when no clocks are produced?

A) $1225
B) $175
C) $35
D) $25