Answer:
A. Apparent authority
Step-by-step explanation:
The liability is as a result of apparent authority.
Apparent authority is the power of an individual or firm to act on behalf of another Individual or firm.
It is used in agency law to refer to a situation in which the principal indicates to a third party that an agent will acts on their behalf.
Oasis store has apparently authorized his employee Miguel to purchase goods from polar inc. on their behalf and when Miguel's appointment was terminated, he could still order goods from polar inc. because polar inc. wasn't aware of the termination of appointment but the apparent authority to make orders for them on behalf of Oasis store.