Answer:
Second option:

Explanation:
The given function is

Remember that the range is the set formed by y-values, that is, the dependent variable elements.
If you think this through, you would deduct that a power cannot be equal to zero or a negative number. All powers are always positive and greater than zero, because the least power that can exist is equal to one, which is
.
Therefore, the right answer is
, because that's the restriction of exponential expression by definition.