Solve the Problem $y = \left( \frac { 1 } { 3 } \right) ^ { x }$

Solve the problem.
-Use the graph of $y = \left( \frac { 1 } { 3 } \right) ^ { x }$ to graph the function. Write the domain and range in interval notation.
$f ( x ) = \left( \frac { 1 } { 3 } \right) ^ { x + 1 } + 3$

A)

Domain: $(-\infty, \infty)$
Range: $(-3, \infty)$
B)

Domain: $(-\infty, \infty)$
Range: $(3, \infty)$
C)

Domain: $( - \infty , \infty )$
Range: $( - \infty , - 3 )$
D)

Domain: $( - \infty , \infty )$
Range: $( - \infty , 3 )$