Which of the following is true about Google?

A、At the very beginning, Google was a company working on artificial intelligence.
B、AlphaGo was a computer program developed by Google DeepMind in New York .

C、Google provides its staff with not only a workplace, but also a fun environment to enjoy themselves.
D、AlphaGo Master plays the board game Go, and beat Ke Jie, the world No. 1 player in 2017.