In which of the following circumstances would an employer be vicariously liable for the acts of an employee?
选项：

A:Where the loss or damage was caused by the employee when performing the duties they were employed to do
B:Where the loss or damage was caused by the employee, but they were not on company business at the time of the incident
C:Where the employee has a valid defense to liability and the injured party has no other course of action available to them