Based on the historical context of colonial America, the most accurate statement about most colonial Americans would be option B: They lived on farms.
During the colonial period, the majority of Americans lived in rural areas and were involved in agricultural activities. Farming was a fundamental part of the colonial economy, and people relied on cultivating crops and raising livestock for sustenance and trade. The agrarian lifestyle was prevalent across the colonies, with families often working their own land or participating in community farming practices.
Options A, C, and D do not accurately represent the overall characteristics of most colonial Americans. While trade for food did occur in some cases, it was not the primary means of sustenance. Urban areas did exist, but the majority of the population resided in rural regions. Additionally, large houses were not common among most colonial Americans, as the focus was on practicality and functionality rather than grandiose dwellings.
Therefore, option B, "They lived on farms," is the most accurate statement reflecting the lives of most colonial Americans.