Which happened earlier: Martin Luther King Jr I Have a Dream speech or Margaret Thatcher becomes first female elected leader of Britain's Conservative Party?

Question 1

Which happened earlier?

A Martin Luther King Jr I Have a Dream speech ✓ Earlier

B Margaret Thatcher becomes first female elected leader of Britain's Conservative Party

Martin Luther King Jr I Have a Dream speech (28 August 1963) came before Margaret Thatcher becomes first female elected leader of Britain's Conservative Party (11 February 1975)

Question 2

Which happened earlier?

A Spanish flu pandemic begins ✓ Earlier

B Pluto discovered

Spanish flu pandemic begins (1 March 1918) came before Pluto discovered (18 February 1930)

Question 3

Which happened earlier?

A Gangnam Style released

B Pluto reclassified as a dwarf planet ✓ Earlier

Pluto reclassified as a dwarf planet (24 August 2006) came before Gangnam Style released (15 July 2012)

Earlier #30