State the Domain and Range of the Function $$f ( x ) = - 6 e ^ { - x } + 1$$

Multiple Choice

State the domain and range of the function.
- $$f ( x ) = - 6 e ^ { - x } + 1$$

A) domain: $( - \infty , \infty ) \cup ( - \infty , \infty )$ ; range: $( - \infty , 1 )$
B) domain: $( - \infty , \infty )$ ; range: $( - \infty , \infty )$
C) domain: $( - \infty , \infty )$ ; range: $( - \infty , 1 ]$
D) domain: $( - \infty , \infty )$ ; range: $( - \infty , 1 )$