Which happened earlier: Empire State Building opens or Mickey Mouse debuts (Steamboat Willie)?

Question 1

Which happened earlier?

A Empire State Building opens

B Mickey Mouse debuts (Steamboat Willie) ✓ Earlier

Mickey Mouse debuts (Steamboat Willie) (18 November 1928) came before Empire State Building opens (1 May 1931)

Question 2

Which happened earlier?

A Pearl Harbor attack ✓ Earlier

B D-Day landings

Pearl Harbor attack (7 December 1941) came before D-Day landings (6 June 1944)

Question 3

Which happened earlier?

A World War II begins

B Hindenburg disaster ✓ Earlier

Hindenburg disaster (6 May 1937) came before World War II begins (1 September 1939)

Earlier #27