"Bleeding Kansas" refers to the . battles between settlers claiming land
slaughter of buffalo on the Plains
war between the U. S. army and native tribes
raids between abolitionists and proslavery militias

D

Explanation:

Bleeding Kansas, Bloody Kansas, or the Border War was a series of violent civil confrontations in Kansas Territory, United States, between 1854 and 1859 which emerged from a political and ideological debate over the legality of slavery in the proposed state of Kansas.

affirmative action refers to the policies that take gender, race, or ethnicity into account in order to promote equal opportunity.

employers subject to title vii are prohibited from taking race or sex into account in any employment decisions. aa is a penalty for having any job group substantially statistically "underutilized" in any race or either sex. the employer must take steps to eliminate the underutilization, then stop, ending its aa efforts