The origin of the American party system can be traced to （ ）.
the conflict between Democrats and Republicans
the constitutional debate between the Federalists and the anti-Federalists
the struggle between those who supported slavery and those who opposed slavery
the struggle between the Royalists and revolutionaries in the War of Independence
美国政党制度的起源可以追溯到联邦党人和反联邦党人之间的宪法辩论。
