An Employer is responsible not only for his own negligence but also for activity done by his employee. This comes under

(A) Vicarious liability # VICARIOUS LIABILITY:> Liability for act of another is a form of strict, secondary liability that arises under the common law doctrine of agency - respondent superior - the responsibility of the superior for the acts of their subordinate, or, in a broader sense, the responsibility of any third party that had the "right, ability or duty to control" the activities of a violator. It can be distinguished from contributory liability, another form of secondary liability, which is rooted in the tort theory of enterprise liability.