Final answer:
A buyer's broker who offers $250,000 for a property, on the command of the buyer, exercises actual authority.
Step-by-step explanation:
The buyer's broker who offers $250,000 for a property, on the command of the buyer, exercises actual authority. Actual authority refers to the authority given explicitly or implicitly by the principal (in this case, the buyer) to the agent (the buyer's broker). In this situation, the buyer has instructed the broker to offer $250,000 for the property, giving the broker the power to act on their behalf within that limit.