How did Josiah Strong influence American imperialism at the end of the 19th century?

How did Josiah Strong influence American imperialism at the end of the 19th century?
 
  A) He argued that the United States had to gain revenge against Spain for the sinking of the Maine.
  B) He stressed that the United States had an obligation to assist colonies in gaining their independence.
  C) He emphasized that the United States had to acquire an empire in order to compete with other powers.
  D) He asserted that the United States had a moral responsibility to civilize other, weaker races.
  E) He claimed that the United States had to establish colonies for black Americans in order to reduce racial tensions.