Find the Domain of the Function $$f ( x ) = x ^ { 2 } + 1$$

Multiple Choice

Find the domain of the function.
- $$f ( x ) = x ^ { 2 } + 1$$

A) $( \infty , \infty )$
B) $( \infty , - 1 )$ or $( - 1 , \infty )$
C) $[ - 1 , \infty )$
D) $( - 1 , \infty )$