A function, f (x), represents the distance, in miles, that sarah drives each hour, x. Select the appropriate domain for this situation.

A. The set of all positive integers.

B. The set of all real numbers.

C. The set of all real numbers greater than or equal to zero.

D. The set of all integers.

I would think that the answer is C because her distance is always increasing as long as shes moving, it isn't asking for direction, so no matter if she goes forward then backwards then forwards again she has still traveled that distance, so I believe its C because you can't go negative distance, even if you go backwards