Why did the US negotiators and Thomas Jefferson think they might not be able to buy the land ?

Thomas Jefferson had always feared the costs of loose construction of the powers delegated to the national government in the Constitution, and the Constitution was silent about acquiring lands from other countries. Jefferson urged bringing the issue to the people to approve with a constitutional amendment, but Congress disregarded his draft amendments. The Senate ratified the Louisiana Purchase Treaty in October of 1803. While Jefferson did his best to follow what he believed was proper constitutional procedure, not enough of his contemporaries agreed with him and he eventually assented.

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Explanation:

question:  

the chart compares religious beliefs to us political party support.

religious beliefs and party support, 2012

this chart demonstrates that

a) more highly religious people supported the republican candidate, while more nonreligious people supported the democratic candidate.

b) more highly religious people supported the democratic candidate, while more nonreligious people supported the republican candidate.

c) more moderately religious people supported the republican candidate, while more nonreligious people supported the democratic candidate.

d) more moderately religious people supported the democratic candidate, while more nonreligious people supported the republican candidate.

answer: a.