The correct answer is B) Populists supported Bryan in his failed presidential race.
The relationship between the Populist Party and William Jennings Bryan was "Populists supported Bryan in his failed presidential race."
William Jennings Bryan(1860-1925) was an American politician from the state of Nebraska who was very popular in the Democratic party. That is why he was selected three times to compete for the Presidency of the United States. That is when the Populist Party also nominated him as a candidate in 1896. The Populist Party had been founded in 1891 to support the farmers and the labor movement in the United States.