Final answer:
The Exclusive Right-to-Sell Listing agreement guarantees a real estate broker a commission if the property sells within the contract period, regardless of who finds the buyer.
Step-by-step explanation:
The listing agreement that gives a real estate broker the exclusive right to the commission earned from helping a client sell a property is the b. Exclusive Right-to-Sell Listing. Under this type of agreement, the broker is guaranteed a commission if the property sells within the contract period, regardless of who actually finds the buyer. This contrasts with other types of agreements, such as the Exclusive Agency Listing, where the seller retains the right to sell the property themselves without owing a commission, or the Non-Exclusive Agency Listing, which allows the seller to list the property with multiple brokers.