To follow the reasonable care standard, what are dealerships NOT required to do?

Answer: A — Run tests unless necessary to diagnose symptoms

Dealerships are not required to run tests unless necessary to diagnose symptoms because this would incur unnecessary costs and labor. The reasonable care standard does not require dealerships to take actions that are not necessary for the proper functioning of the vehicle. Inspecting the exterior and interior (option B), test driving (option C), and inspecting under the hood (option D) are all important steps in ensuring the vehicle is in good condition and meets safety standards, therefore they are required under the reasonable care standard.