What weakness of the articles of confederation most likely made it impossible for all citizens to be adequately represented

The articles of confederation only allowed for one vote in its congress for each state. More clearly, each state could only cast one vote in the congress. Thus, states with lower population granted more representation for each citizen than for states with higher population. I.E. Delaware and New Jersey, 2 of the states with lower population supported this plan because it meant more power to each of its citizens.

That really sucks, but i don't know who your leader is, and i don't want to write that much