Among the eras triumphs were the Civil Rights Act of 1964, barring segregation in public places; the 24th Amendment to the Constitution, ratified in 1964, prohibiting the poll tax; and the 1965 Voting Rights Act, which ordered the state
should abolish literacy tests as a requirement for registering to vote.
The sentence has a list of three items
- Civil Rights Act of 1964
- 24th Amendment to the Constitution, ratified in 1964
- the 1965 Voting Rights Act
and each of the items is provided with brief detail. As per the third the state was ordered to abolish literacy where ‘ordered’ is the verb – a commanding verb and ‘should abolish’ is the Voting Rights Act’s intention. Observing the answer choices there’re no other differences among them.
A. should abolish literacy tests as a requirement for registering to vote. – WRONG. A helping verb ‘should’ doesn’t communicate intention.
B. would abolish literacy tests as a requirement for registering to vote. – WRONG. Same as option ‘A’.
C. to abolish literacy tests as a requirement for registering to vote. – CORRECT. ‘To + Verb’ s used for intentional purpose.
D. abolishing of literacy tests as a requirement for registering to vote. – WRONG. Verb+ing form of abolish with a prepositional phrase is not used for communicating intention.
E. the abolishing of literacy tests as a requirement for registering to vote – WRONG. Here ‘the’ is added to option D however it’s still not error free.
IMO Answer (C).