Racial policies were mostly those that dealt with the issue of slavery at first and later with the issue of civil rights. Court's decision to have the anti-slavery acts and to later have the civil war acts impacted African-Americans a lot. A case when it comes to ethnicity is for example the court's decision that affirmative action can often be treated as positive racism and that such laws and policies have to pass strict scrutiny and be analyzed to prevent discrimination. Religious groups often had court problems because of issues regarding homosexuality or abortions in which it was established that religious groups have all the freedom to believe what they want but same-sex marriages and abortions can be provided to all people regardless of religion.
The South had always been less enthusiastic about the railroad industry than the North; its citizens preferred an agrarian living and left the mechanical jobs to men from the Northern states. The railroads existed, they believed, solely to get cotton to the ports.
From what I can see there are multiple correct answers. B and C are both correct. If you can only pick one I'd go with C. More recently businesses have moved more into cities.
6; D, Prophet of Islam.
7; C, Safavid ruler.
8; E, Caliph recognized by Sunni Muslims.
9; B, Ruler of Mali.
10; A; Ruler of Ethiopia.
Hope this helped, sweetie!