Which of the following statements are correct?
(A) Jallianwala Bagh Massacre took place in the year 1919.
(B) People were agitated over the arrest of Dr. Kitchlu and Dr. Satyapal and assembled there.
(C) General O'Dyer fired at people who assembled in Jallianwala Bagh.
(D) Gandhiji Returned his knighthood in the protest.
(E) Sardar Hardayal killed General O'Dyer in London.
Choose the correct answer from the options given below :