The correct answer is A. Football.
The Merdeka Cup is an annual international football competition held in Malaysia. It was first held in 1957 to commemorate the independence of Malaysia from the British Empire. The competition is open to all national teams, and has been won by a number of different countries, including Malaysia, Indonesia, Thailand, Singapore, and Vietnam.
The Merdeka Cup is one of the most prestigious football competitions in Southeast Asia. It is a popular event, and attracts large crowds of spectators. The competition is also important for the development of football in Malaysia, as it provides a platform for local players to compete against international teams.
The other options are incorrect because they are not associated with football. Tennis is a racket sport that can be played individually against a single opponent (singles) or between two teams of two players each (doubles). Badminton is a racquet sport that can be played individually against a single opponent (singles) or between two teams of two players each (doubles). Hockey is a team sport in which two teams play against each other by trying to maneuver a ball into the other team’s goal using a hockey stick.