State the Domain and Range of the Function $$f ( x ) = 2 ^ { - x } + 2$$

Multiple Choice

State the domain and range of the function.
- $$f ( x ) = 2 ^ { - x } + 2$$

A) domain: $( - \infty , \infty ) \cup ( - \infty , \infty )$ ; range: $( - \infty , 2 )$
B) domain: $( - \infty , \infty )$ ; range: $( - \infty , 2 )$
C) domain: $( - \infty , \infty )$ ; range: $( - \infty , 2 ]$
D) domain: $( - \infty , \infty )$ ; range: $( 2 , \infty )$