The correct option is C. necessity. Explanation of the Correct Answer In the context of agency law, an agent is someone who acts on behalf of another person (the principal) in business transactions. When it comes to perishable goods, the situation can become urgent, and the law recognizes that sometimes an agent may need to act without prior authority from the owner to prevent loss or damage to the goods.

1. Necessity: This principle applies when an agent must act to protect the interests of the principal in an emergency situation. For perishable goods, if an agent does not have prior authority but needs to sell the goods to prevent them from spoiling, they can be considered an agent by necessity. The law allows this to ensure that the principal does not suffer a loss due to the agent's inability to obtain prior consent.
2. Example: Imagine a fruit vendor who has a shipment of ripe bananas that are about to spoil. If the vendor does not have explicit permission from the owner to sell the bananas but knows that they will go bad soon, the vendor can sell them to prevent loss. In this case, the vendor acts as an agent by necessity.

Why the Other Options Are Incorrect

• A. Estoppel: This legal principle prevents a party from arguing something contrary to a claim made or implied by their previous actions or statements. In the context of agency, estoppel would not apply here because it does not create an agency relationship; rather, it prevents a party from denying the existence of an agency that has already been established. In this case, the agent is acting without prior authority, so estoppel does not apply.
• B. Conduct: This option suggests that the agent's actions alone create an agency relationship. While conduct can establish an agency relationship in some cases, it typically requires some form of consent or acknowledgment from the principal. In the case of perishable goods, the agent's conduct alone does not suffice to create an agency relationship without the element of necessity.
• D. Ratification: Ratification occurs when a principal approves an act that was performed by an agent without authority. This means that the principal can later agree to the agent's actions, making them valid. However, in the scenario of perishable goods, the agent acts without prior authority and does not wait for the principal's approval. Therefore, ratification is not applicable in this immediate context.

Summary of Key Points

• An agent can act without prior authority in emergencies involving perishable goods, establishing an agency by necessity.
• The principle of necessity allows the agent to sell goods to prevent loss or damage.
• Other options like estoppel, conduct, and ratification do not apply in this scenario as they do not create an agency relationship under the circumstances described.
• Understanding the concept of agency by necessity is crucial for dealing with urgent situations in commerce, especially with perishable items.

This thorough understanding of agency principles will help you navigate similar questions in your professional exams.