How many gold medals did Phelps win at the 2007 World Swimming Championships?

At the 2007 World Swimming Championships, Phelps won 7 gold medals in one go. The answer is B.

The gold-winning events and results are as follows: 100-meter butterfly gold medal (50.77), 200-meter butterfly gold medal (1:52.09), 200-meter individual medley gold medal (1:54.98), 400-meter individual medley gold medal (4:06.22), 200-meter freestyle gold medal (1:43.86), 4×100-meter freestyle relay gold medal (3:12.72), 4×200-meter freestyle relay gold medal (7:03.24).

Phelps was born into a middle-class family in the United States. When he was very young, Phelps was diagnosed with attention deficit hyperactivity disorder, also known as ADHD. He can't concentrate on anything and can't stop for a moment. His big ears and long arms can become a joke among his classmates. During that time, he needed drugs to "quiet" himself, until he encountered swimming.

When he was 7 years old, he had the opportunity to learn swimming in a club for the first time. At the age of 11, Phelps began systematic training, practicing seven days a week and swimming five hours a day. His lung capacity quickly increased to 15,000 milliliters, which allowed him to reduce the number of ventilations to increase the distance he could travel in the water. At the same time, his coach asked Phelps to use the standard movements of adult swimmers (increasing the original 2 kicks per stroke to 6 kicks).

At the 1999 American Junior Games, at the age of 14, he broke the 200-meter butterfly record in the 20-year-old age group. Since then, Phelps has also begun to appear in the public eye.

At the Athens Olympics, Phelps won 8 medals in one fell swoop, including the men's 200m, 400m individual medley, 100m, 200m butterfly, 4,200m freestyle relay and 4,100m 6 gold medals in the medley relay, and 2 bronze medals in the 200m freestyle and 4 100m freestyle relays.

At the 2008 Beijing Olympics, Phelps won 8 gold medals and broke 7 world records. At the 2016 Rio Olympics in Brazil, Phelps won the 23rd Olympic gold medal in his career and became a legend.