John purchased a new lawnmower two years ago. After significant use, the lawnmower needed servicing. A repairman sharpened the blade, but he failed to reattach it properly to the lawnmower. When John was using the lawnmower, the blade flew off and seriously injured John's daughter. From the standpoint of a commercial liability loss for the repair shop, this is an example of Select one: A. Liability for operations by others. B. Products liability. C. Premises and operations liability. D. Completed operations liability