They may prefer appointment of judges rather than election to avoid having judges who have biases towards cases & people that they judge upon? (Hopefully that helps a little, I hope it isn't confusing)
D - to explain the structure and role of state governments.
Article 2 of the Confederation is all about State Sovereignty stating that the states have the power to keep its freedom, independence and power.
They experienced long periods of peace. They experimented with republican forms of government. They saw the overthrow of their kings during these years. They all had absolute rulers who built strong, central governments.
I think it is
c) Many cities have developed along it.
