The correct answer is (c) Serena Williams.
Serena Williams won the Rome Masters (2015) women’s singles title by defeating Maria Sharapova in the final. Williams won the match in two sets, 6-1, 6-3.
Carla Suarez Navarro was the runner-up in the Rome Masters (2015) women’s singles tournament. She lost to Serena Williams in the final.
Daria Gavrilova was the third-place finisher in the Rome Masters (2015) women’s singles tournament. She lost to Maria Sharapova in the semifinals.
Here is a brief description of each option:
(a) Carla Suarez Navarro is a Spanish professional tennis player. She has won 10 singles titles on the WTA Tour, including the 2015 Monterrey Open. She has also reached the quarterfinals of the French Open twice, in 2014 and 2015.
(b) Maria Sharapova is a Russian professional tennis player. She has won five Grand Slam singles titles, including the 2004 US Open, the 2006 Australian Open, the 2008 French Open, the 2012 Wimbledon Championships, and the 2014 US Open. She has also been ranked world No. 1 in singles by the Women’s Tennis Association (WTA) on five occasions.
(c) Serena Williams is an American professional tennis player. She has won 23 Grand Slam singles titles, the most in the Open Era and the second-most in history, behind Margaret Court’s 24 titles. She has also been ranked world No. 1 in singles by the Women’s Tennis Association (WTA) on 31 occasions, the most in history for a female player.
(d) Daria Gavrilova is an Australian professional tennis player. She has won two singles titles on the WTA Tour, including the 2017 Nottingham Open. She has also reached the quarterfinals of the Australian Open twice, in 2017 and 2018.