Serena Williams
Serena started playing tennis at the age of three. Her father, Richard Williams, had had observed his daughter's talent for tennis. He was her first coach. Even at age three, Serena was strong enough to play tennis for two hours a day. By 2002, Serena had won the Wimbledon, the French Open, and the and the United States Open Tennis Championships. In 2003, she won the Australian Open and by 2012, Williams had won 15 Grand Slam singles titles and 13 Grand Slam doubles titles. In 2015, she won the Wimbledo

Which sentence is the best introductory sentence to the paragraph?
A. Serena built schools in Africa to help underprivileged African youth.
B. Serena was selected by People magazine as one of America's most interesting people.
C. Serena and her sister, Venus Williams, were trained by their father.
D. Serena Jameka Williams was born in Saginaw, Michigan on September 26, 1981.