Which happened earlier: Exxon Valdez oil spill or Channel Tunnel opens?

Question 1

Which happened earlier?

A Exxon Valdez oil spill ✓ Earlier

B Channel Tunnel opens

Exxon Valdez oil spill (24 March 1989) came before Channel Tunnel opens (6 May 1994)

Question 2

Which happened earlier?

A First Harry Potter book published ✓ Earlier

B Google Maps launches

First Harry Potter book published (26 June 1997) came before Google Maps launches (8 February 2005)

Question 3

Which happened earlier?

A The Matrix released ✓ Earlier

B Bitcoin whitepaper published

The Matrix released (31 March 1999) came before Bitcoin whitepaper published (31 October 2008)

Earlier #16