Final answer:
The Texas Real Estate Commission(TREC) is comprised of 9 commissioners, and the Supreme Court consists of 9 associate justices.
Step-by-step explanation:
The subject of this question is Social Studies and it is appropriate for Middle School students.
TREC stands for Texas Real Estate Commission, which regulates real estate activities in Texas. The TREC is comprised of 9 commissioners.
Additionally, in the provided reference, we learn that the Supreme Court consists of 9 associate justices, making option D the correct answer.