What is the process for changing the Constitution?

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.

The victory of andrew jackson in the presidential elections of 1828 was aided by (1) the support of eastern bankers (2) implementing woman's suffrage (3) reducing property qualification for voting (4) the endorsement of northern abolitionists

Why did the 24th amendment and the civil rights act succeed when other legislation had failed?