An underfunctioner is one who does too little and expect others to manage things for them when it comes to life and relationship. In the eyes of others, they are seen as irresponsible as they rely on others to do things they are meant to do; they waste potentials. The undefunctioner most times feels incapable and further allows it by expecting others to be responsible for them, as against an overfunctioner who is termed responsible.
In a relationship consisting of an underfunctioner and overfunctioner, the underfunctioner does too little and this compels the overfunctioner to do too much, so as to bridge the gap.
It's a hard choice between A and D, but I think A leans more closely to the answer. The whole point of the Articles of Confederation was trying to make a unifying Union while keeping the states' independence.
