Final answer:
An agency relationship can be created by implication, oral agreement, or written agreement.
Step-by-step explanation:
An agency relationship can be created by any of the answers shown, including implication, oral agreement, and written agreement.
For example, an agency relationship can be implied when one party acts on behalf of another party without any formal agreement. This can happen when someone acts as an agent for a friend by making purchasing decisions on their behalf.
On the other hand, an agency relationship can also be created through an oral or written agreement, where both parties agree to the terms and responsibilities of the agency relationship.