Solve the Problem $c = 49 ( n + 9 ) ^ { 1 / 2 }$

Multiple Choice

Solve the problem.
-The cost of manufacturing clocks is given by $c = 49 ( n + 9 ) ^ { 1 / 2 }$ , where $c$ is the cost in dollars and $n$ is the number produced. What is the cost when no clocks are produced?

A) $\$ 49$
B) $\$ 147$
C) $\$ 441$
D) $\$ 21$