题目解析:
文本第五句:“Whigs appealed to planters who needed credit to finance their cotton and rice trade in the world market,…"说明辉格党人,而不是民主党人受到参与国际贸易的种植园主的支持,故应选B. 其他选项在文本第六句中“Democrats attracted farmers isolated from the market or uncomfortable with it,...”都有提及,他们是支持民主党的。