Find the Sum or Difference $$( r - 15 ) ^ { 2 }$$

Multiple Choice

Find the sum or difference.
- $$( r - 15 ) ^ { 2 }$$

A) $225 r ^ { 2 } - 30 r + 225$
B) $r ^ { 2 } + 225$
C) $r ^ { 2 } - 30 r + 225$
D) $r + 225$