Final answer:
If no commission amount or percentage is stated in the listing agreement, the customary or normal commission rate would apply, which is standard in the local real estate market.
Therefore, option C is correct.
Step-by-step explanation:
If a commission amount or percentage is NOT stated in the listing agreement, then the normal rate of commission would typically apply. This situation assumes that there is an established or customary commission rate in the area where the transaction is taking place. Without a specified commission in the agreement, courts often defer to what is considered 'standard' or 'customary' in the local real estate market. The broker would not be automatically disqualified from receiving a commission. Instead, the absence of a specified rate means that the customary rate is assumed. It's important to note that the other options presented are incorrect: The broker would indeed be entitled to a commission; the legal rate of interest would not apply, as this pertains to money owed and not services rendered; and the Real Estate Commissioner does not determine commission rates for individual transactions.