Final answer:
Section 1101.559 of TRELA requires written consent for a broker to act as an intermediary in a real estate transaction, which must outline the broker's obligations and confirm agreement on payment and role. The correct answer is A.
Step-by-step explanation:
The section of the Texas Real Estate License Act (TRELA) that requires written consent for a broker to act as an intermediary is Section 1101.559. According to this section, a broker who agrees to act as an intermediary between parties involved in a real estate transaction must obtain written consent from each party, outlining the broker's obligations during the intermediary process. The written consent must clearly indicate who will pay the broker and confirm the parties' agreement to the broker's role. Failing to obtain such consent can lead to legal and professional consequences for the broker. The correct answer is A.