The correct answer is A. Australian Open, French Open, U.S. Open, and Wimbledon.
A Grand Slam in tennis is a series of four major tennis tournaments held each year: the Australian Open, the French Open, Wimbledon, and the U.S. Open. The term “Grand Slam” was coined by American sportswriter Alison Danzig in 1933, and it was first achieved by Don Budge in 1938.
To win a Grand Slam, a player must win all four major tournaments in the same year. This is an extremely difficult feat, as it requires the player to be in peak physical condition and to be able to adapt to different playing surfaces and conditions. Only 14 men and 5 women have ever won a Grand Slam in singles.
The Australian Open is the first major tournament of the year, and it is held on hard courts in Melbourne, Australia. The French Open is the second major tournament of the year, and it is held on clay courts in Paris, France. Wimbledon is the third major tournament of the year, and it is held on grass courts in London, England. The U.S. Open is the fourth and final major tournament of the year, and it is held on hard courts in New York City, United States.
Winning a Grand Slam is considered to be the highest achievement in tennis. It is a testament to a player’s skill, determination, and mental toughness.