Answer:
Domain of the function that is parabola is all real numbers.
Hence, option 1 is correct.
Step-by-step explanation:
We have been given a parabola opens up and with vertex (2,-3)
Then equation for the given parabola is:

Domain is the values of x from a function:
Hence, the domain can be any real number
Therefore, option 1 is correct that is all real numbers.