What Is the Difference Between an Insurance Broker and an Insurance

What is the difference between an insurance broker and an insurance agent?

A) An insurance agent works exclusively for one company, while an insurance broker works for a number of insurance companies.
B) An agent requires a commission payment after a deal is made, while a broker requires a service charge to be paid before the deal is made.
C) An agent represents the insured, while a broker represents the company.
D) An agent is authorized to sell insurance directly, while a broker can only mediate an insurance contract.