Answer:
A.(0, 1)
Step-by-step explanation:
This is an exponential function, which is a function where the independent variable <em>x </em>appears in the exponent and has a constant <em>a </em>as its base. Its mathematical expression is:

The image of 0 is always 1 and the image of 1 is always a:

Thus, exponential functions always pass through the points (0, 1) and (1, a).
I attached you a graph that illustrates the behavior of the function.