Answer:
c. An agency relationship
Step-by-step explanation:
An agency relationship is a mutual relationship, in which one person (i.e the principle ) gives a permission to an agent so as to act on their behalf.
In this relationship the agent must consent to the instructions of the person i.e the principle.
Here in the question, Stefanie acting as Principal who has directed the agent (which is the bank in the given case ) to execute a task.