Drag the tiles to the boxes to form correct pairs.
Match each development of the twenty-first century to the year in which it took place.

1. 2016
2. 2011
3. 2005
4. 2000

A. Stanley wins the DARPA Grand Challenge race.

B. Honda develops the humanoid robot ASIMO

C. AlphaGo defeats the world Go champion.

D. Watson defeats human contestants on the game show jeopardy