The correct answer is A) poor farmers.
The group of people that would have been MOST LIKELY to support Watson and the Populist Party are poor farmers.
We are talking about Thomas E. Watson, a populist politician from the state of Georgia. He became the leader of the Populist Party with the support of the poor farmers. The Populist Party launched severe critics to wealthy businessmen, bankers, and members of the Democratic Party. In 1890, he was elected to the House of Representatives.