Mike Worked for Frank's Pizza as a Driver and Is

Mike worked for Frank's Pizza as a driver and is an agent.His duties consisted of making deliveries along a designated route.One day Mike decided to see his girlfriend,Jackie,who lived 50 miles out of his pizza route.While driving to his girlfriend's,Mike injured a pedestrian,Chuck.The accident was caused because of Mike's negligent driving.Chuck is now suing both Mike and Frank's for personal injuries.Under the circumstances:

A) Frank's is liable under the doctrine of respondeat superior.
B) Frank's is never liable for the negligent torts of its agents.
C) Chuck can recover damages from both Frank's and Mike.
D) Frank's is not liable because Mike's was on a frolic of his own