Which of the following statements is true about net listings?

A)net listings are discouraged by TREC but are NOT strictly speaking, illegal in Texas B) net listings should ONLY be taken when the principal insists and appears to be familiar with current real estate values C) TREC discourages net listings because brokers are fiduciaries and net listings have a tendency to place the agents interests above those of his client with reference to obtaining the BEST possible price D) all of the above