Pls help.plsss

In duncan v. louisiana, the supreme court ruled that the [blank](fourth, fifth, sixth) amendment could be incorporated to the states. the [blank](equal protection, due process, enforcement) clause of the fourteenth amendment allowed incorporation to take place in this case.

Which factor has played the most important role in changing the way history is studied over time?

What potential crisis did eleanor roosevelt resolve on behalf of president roosevelt