Which of the following is not a reason why the United States became involved in the internal affairs ...

Which of the following is not a reason why the United States became involved in the internal affairs of European nations after World War II?
 
  A) The development of long-range bombers meant the Atlantic and Pacific Oceans no longer provided protection.
  B) They pushed to rebuild Europe to prevent another economic collapse.
  C) World War II taught U.S. officials about the need to stand up to aggressive expansionists early and forcefully.
  D) The Unite States sought markets for its manufactured products.
  E) None of these are correct.