Question Formation and Framing - Class VII

Choose the missing question word below that would give you one of the answer options marked. (You do not have to give the answer.) Choose from (A), (B), (C) or (D). There is an example at the beginning (0).
(0) ____ did the first man land on the Moon?
(i) in 1968 (ii) in 1969 (iii) in 1970
(A) When (B) Where (C) Who (D) Why
Answer : (A)