How was the congress initially set up?

In 1787, a convention of specially selected delegates proposed a new constitution that strengthened the national government and established a representative branch composed of a House and Senate. From the beginning, the two bodies of Congress were meant to be different, yet interdependent.

Explanation:

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation: