“The car is an AWD Subaru and from the other posts, it sounds like it is not a good idea to tow this particular vehicle on a car dolly.”
Unless you want to do some very expensive repair work on the center differential and possibly some other components in the AWD system, your Subaru should NOT be transported on a dolly. It can only be safely moved on a flat-bed, and that would add considerably to the weight that you are asking the truck to tow.
(Note: On some Subaru models, there is a fuse that can be inserted to “convert” the vehicle temporarily to FWD, and this would allow you to mitigate the damage from towing it on a dolly.)