The answer is letter a. It created a too-weak national government. When Congress drafted the nation's first constitution in 1777, it knew that many Americans dreaded a powerful national government. For that reason, the proposed Articles of Confederation created a framework for a loose confederation of states. Within this coalition, each state would retain "sovereignty, freedom, and independence." Also, the Congress was made up of delegates chosen by the states and could conduct foreign affairs, create treaties, proclaim war, uphold an army and a navy, coin money, and establish post offices. However, measures passed by Congress had to be approved by 9 of the 13 states. Since the Articles did not set up an executive branch to carry out the laws or a judicial branch to settle legal questions.
Recolonization of slaves and complete abolition of slavery.
Three groups emerged in the 1830's-1840's each with a differing view of how to end or contain slavery. The most conservative approach was the recolonization approach. The American Colonization Society created the colony of Liberia with the intent of freeing slaves and sending them back to Africa. The most liberal approach came from the Liberty Party who advocated for the complete end of slavery based on moral grounds. The Liberty Party wanted slavery to end immediately with blacks receiving citizenship rights.
The moderate approach to slavery that emerged at the time didn't directly end slavery but hoped to contain the institution. Free-soilers emerge after the Mexican-American War and believed that the new land gained should be free from slavery. By containing slavery to the South, the system would eventually snuff itself out without extra land available to expand the system.
C or D
I hope this answer will help you a bit.