Which of the Following Transactions Does Not Take Place in the Markets

Which of the following transactions does not take place in the markets for the factors of production in the circular-flow diagram?

A) Kosuke provides plumbing services for a plumbing company and receives an hourly wage from the company for his services.
B) Alfonso works as a marriage counselor and his clients pay him on a per-hour basis for his services.
C) Geovany owns several shopping malls and receives rent payments from the companies that operate those malls.
D) Carlos sells advertising for a newspaper and receives a commission from the newspaper company for each advertisement that he sells.