Answer: Yeoman farmers
Explanation: Jefferson and the form of democracy he aimed to popularize, supported yeoman farmers and was against the other options listed in this question, the factory worker, merchant and banker.
The new republic represented freedom from corruption, aristocracy and British rule and the yeoman farmer was a perfect example of people who were not touched by any of these as they simply relied on the land and their farm yield. Jefferson therefore believed that they represented the virtue and wholesomeness of the new republic.