The answer should be evolutionary theory, good luck!
They feared that a central government would become tyrannical
The Articles of Confederation did not create a strong central government. As a result, the federal government could not negotiate foreign treaties without agreement from the states, and contained no provision for federal courts. The national government under the Articles of Confederation was simply too weak as it also lacked taxation powers
The correct answer to your first question is C. The correct answer to your second question is A.
Answer: All-encompassing sectional differences on the issue of slavery, such as outright support/opposition of slavery, economic practices, religious practices, education, cultural differences, and political differences kept the North and South at near constant opposition to one another on the issue of slavery.