The correct answer is (d) Serena Williams.
Serena Williams won the US Open Tennis Tournament, 2011 (Women’s Singles) by defeating Samantha Stosur in the final. Williams won the match in two sets, 6-4, 6-2. This was Williams’ fourth US Open title and her 13th Grand Slam title overall.
Angelique Kerber is a German professional tennis player. She has won 13 singles titles, including three Grand Slam titles at the Australian Open (2016), US Open (2016), and Wimbledon (2018). Kerber has also won two WTA Finals titles (2016 and 2018).
Caroline Wozniacki is a Danish professional tennis player. She has won 28 singles titles, including one Grand Slam title at the Australian Open (2018). Wozniacki has also won one WTA Finals title (2017).
Samantha Stosur is an Australian professional tennis player. She has won 11 singles titles, including one Grand Slam title at the US Open (2011). Stosur has also won one WTA Finals title (2011).