Questions 14~16 are based on the following dialogue. You now have 15 seconds to read questions 14~16. When did Ali announce that he had become a Black Muslim
A.He announced that he had become a Black Muslim after defeating Liston in a championship fight. B.He announced that he had become a Black Muslim while he was still an amateur boxer. C.He announced that he had become a Black Muslim after the Vietnam War. D.He announced that he had become a Black Muslim when he retired form boxing in 1980.