the answer is to influence public policy.
The biggest benefit of using an indentured or contract bound servant was that they got free passage to the New World. It was the indentured servants who did most of the dirty and dangerous work in the New World since they were non essential and of little significance.
The drawback of using indentured or contract bound servants for labor was that they were only able to work for someone for a certain number of years as mentioned in their contracts. Then they had to be set free unlike the slaves who did not needed to be set free after a certain time period.
List the statements we don't know what the options are
Your answer is D.C. It struck down segregation laws as unconstitutional. Bonus information: It reversed Plessy v. Brown where the Supreme Court ruled that" separate but equal" facilities for blacks and whites was constitutional.