Licensees must be compensated according to certain regulations. One of the most important regulations regarding compensation is that

A) The sales agent may only receive compensation from the sponsoring broker.
B) The sales agents must abide by the standard rate of commission prevalent in the local market.
C) Sales agents cannot receive compensation from sales agents or principals - only other brokers.
D) Sales agents and brokers comply with commission guidelines promulgated by the TREC.