All of these were means of allowing white Americans to vote while preventing African-Americans from ...

All of these were means of allowing white Americans to vote while preventing African-Americans from voting EXCEPT the
 
  A) white primary.
  B) grandfather clause.
  C) poll tax.
  D) caucus system.
  E) literacy test.

Question -2-

What amendment gave women the right to vote?
 
  A) Fifteenth
  B) Nineteenth
  C) Twenty-first
  D) Twenty-second
  E) Fourteenth

Question -3-

What was added to some state laws to ensure that whites who were illiterate or poor could still vote?
 
  A) a poll tax
  B) a literacy test
  C) the white primary
  D) the legacy guarantee
  E) a grandfather clause

Question -4-

Initially, the question of who could vote was left up to
 
  A) the states.
  B) the president.
  C) Congress.
  D) the Supreme Court.
  E) the House.