Final answer:
The accuracy of the statements about real estate commissions depends on the agreed commission rates and specific payment agreements. Without additional information, the true statement cannot be identified.
Step-by-step explanation:
The question revolves around the payment of real estate commissions in a property sale. Carlton's Great Aunt Matilda has agreed to pay any portion of Joan's commission that the sellers do not cover. Teresa's father, Teddy, has agreed to pay half of the sales commission owed to the listing agent, Reggie, who is representing the sellers, Zeb and Teresa Martin. To determine the truth within these statements, one would have to know the agreed commissions for both the buyer's and seller's agents.
Without that information, or the details of any agreements made regarding commission payments, the true statement cannot be conclusively provided.