principal may be held legally responsible for information known to the agent but not actually known by the principal under the concept of

Group of answer choices

Imputing knowledge.

Estoppel.

Warranty of authority.

The relation back doctrine.

Apparent authority is

Group of answer choices

Conduct by the agent that gives the third party the impression that the agent had the authority.

An express grant of authority.

Ratification of the agent's act by the principal.

Conduct by the principal that gives the third party the impression that the agent had the authority.