Delegates at the Constitutional convention of 1787 agreed to create a Senate and a House of Representatives as a way to...

To factor in the need to all states.

Explanation:

The major struggle between all of the colonial states was how they would be represented. States like Virginia wanted a system in which votes were cast by population, so big states had much more power than a small state such as Rhode Island.

By doing this, they implement the House of Representatives (a system in which bigger states have more power) and a Senate in which each state, regardless of size, had only two representatives. This extended power in both directions and suited peoples needs.

b.   jim crow laws were enacted in northern states.

it's lower nubia : ) good luck