Which of the items below explains how literacy tests used to disenfranchise voters? Please choose the best answer.
A: They prevented people from voting as voters were not aware they had to prepare for the literacy tests.
B: They disqualified people from registering to vote by automatically failing Black People.
C: They prevented people from voting by charging fees to be able to take the test
D: They disqualified people from registering to vote based on the administrator's interpretation of the person's answers.