Cut them out so I can see
D. they enforce the laws in court
I think its was because of Lincoln's rejection of the Final Compromise.
(Extension of Slavery)
I think it is b. If it is not be I would say a then.
As the head of the administration of his province, the satrap collected taxes and was the supreme judicial authority; he was responsible for internal security and raised and maintained an army.They served as the chief judge for their region, adjudicating disputes and decreeing the punishments for various crimes. Satraps also collected taxes, appointed and removed local officials, and policed the roads and public spaces.