Answer:
Letter B and D are the correct answer.
Step-by-step explanation:
Letter B is correct because the first radio broadcast took place in 1906 in Massachusetts. On August 20 1920, almost 2000 broadcast tests. Also, on November 2, 1920 radio station KDKA started broadcasting from Pittsburgh.
Charleston is a variety of foxtrot that became very popular during the 1920s. Its name comes from Charleston, South Carolina. It was made popular by The Charleston James P. Johnson.