Please choose the correct one from the set of possible answers to this question.

He listens to relaxation music every night to get a good night's sleep.

It's important to have a pleasant sleep every night.

He became famous on 'Idiotter' (Twitter).

San Pedro is part of a community in Los Angeles, an old name.

I want to go to San Diego, which used to be called Sanko.

It is said that in the old days, Kaisen people used to live in this area.

He is a master of card counting in Blackjack.

He is using the technique of counting cards in Blackjack.

The shaft of this building is very narrow.