Answer:
The most important outcome of the Adams-Onis Treaty of 1821 was Florida was acquired by the United States. The treaty was considered as a victory for North America. Florida had already become an emerging problem for Spain by then.
The provision that the United States Constitution contains from the original Virginia Plan would be that "<span>C) House and Senate representation is proportional to population size", although it is only the House that is proportional to population size, not the Senate. </span>
The Founding Fathers were very opposed to being taxed by the British government because they had no representation in Parliament, which the colonists viewed as being tyrannical.
