Final answer:
A real estate broker is a professional who helps individuals in buying, selling, or managing properties.
Step-by-step explanation:
The correct answer is D) All of the above.
A real estate broker is a professional who helps individuals in buying, selling, or managing properties.
In option A, a person who helps buyers find their dream homes is acting as a buyer's agent, which is a type of real estate broker.
In option B, a person who assists sellers in marketing and selling their properties is acting as a listing agent, which is another type of real estate broker.
In option C, a person who manages rental properties on behalf of landlords is acting as a property manager, which is also considered a form of real estate broker.