How did African American participation in North Carolina government change during Constitutional Reconstruction? It decreased because new black code laws restricted holding office and voting.
It increased because African Americans were elected to a variety of political offices.
It decreased because African Americans lost the right to vote during this time period.
It increased because African Americans were required to fill a certain number of offices.

I would say

It decreased because new black code laws restricted holding office and voting. BUt not sure

Explanation:

Because the Congress refused to seat North Carolina’s newly elected representatives and senators, as well as those from other southern states. This congressional or “Radical Reconstruction” would delay North Carolina’s re-admittance to the Union for two and a half years.

yes. it has been proven significantly, especially with a more than ever huge influence of social media & everybody's opinion. for example, we could bring up movements such as the black live's matter movement, or something as such as the march for our lives movement. more than ever it seems as though everybody is starting to care more about this world.

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;