Provide an Appropriate Response $y = 2 ^ { x }$

Multiple Choice

Provide an appropriate response.
-What are the domain and range for the equation $y = 2 ^ { x }$ ?

A) Domain: $( \infty , \infty )$ ; range: $( 0 , \infty )$
B) Domain: $( 0 , \infty )$ ; range: $( \infty , \infty )$
C) $( \infty , \infty )$ ; range: $[ 0 , \infty )$
D) Domain: $( \infty , \infty )$ ; range: $( \infty , \infty )$