can i get help ? i’ve been stuck on this answer

Answer:
Your answer is right, it is the last one....
Please mark as brainliest....
Step-by-step explanation:
The domain of a function is the complete set of possible values of the independent variable. ... The domain is the set of all possible x-values which will make the function "work", and will output real y-values. When finding the domain, remember: The denominator (bottom) of a fraction cannot be zero.
Credit:
Domain and Range of a Function - Interactive Mathematics