Who has won the 2016 US Open men’s singles tournament?
[A]Rafael Nadal
[B]Andy Murray
[C]Stanislas Wawrinka
[D]Novak Djokovic

Stanislas Wawrinka
Stanislas Wawrinka, a Swiss professional tennis player, has won the 2016 US Open Men’s Singles tennis tournament by defeating Novak Djokovic in the final by 6-7, 6-4, 7-5, 6-3. This is his first US Open title and 3rd major title.