Solve the Problem $$( n + 3 ) ^ { 2 }$$

Multiple Choice

Solve the problem.
- $$( n + 3 ) ^ { 2 }$$

A) $n ^ { 2 } + 9$
B) $n + 9$
C) $9 n ^ { 2 } + 6 n + 9$
D) $n ^ { 2 } + 6 n + 9$