What issues or events highlighted the insufficiency of the central govermeant under the articles of cknfederation

The Articles of Confederation was an agreement a that served as the first constitution. They stablished the Central government and gave it limited powers like those of Parlament. While the American states grew, the limitations of the Central Goverment were apparent and showed it was weak and unable to govern them efficiently. The result was individual requests for changes to the Articles, ultimately it became the Federal Government under the Constitution.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."