单选题 Which of the following prepositional phrases functions as an object complement?

• A. Back at his farm, Penelope, his wife, called her suitors fools.
• B. Most people did not get a first glimpse of the wonder of television until the 1939-1940 World's Fair in New York.
• C. My supervisor considers his least favorite duty dealing with customers.
• D. The guidebook has announced the best place to swim along the north beach.