Which of the Following Is True? During the 1992 Barcelona

Which of the following is true? During the 1992 Barcelona Olympic Games

A) It was estimated that the costs associated to produce the Barcelona Olympiad were approximately $7.5 billion.
B) Athletes from the former Soviet Union competed under the guise of the Commonwealth of Independent States.
C) The social theme of the Barcelona Olympiad was a "smoke-free Olympics".
D) U.S. athletes that were on the basketball team were known as the "Dream Team" because most of . these players were National Basketball League (NBA) all-stars.
E) All of the above.