Correct Answer: C
Explanation:
When you consider the choices, immediately eliminate answers that are irrelevant to the question and/or the major issue of the passage, and answers not at all addressed by the passage. You may eliminate all choices that do not address the free choice not to vote:
A is irrelevant because it addresses the number of choices rather than the freedom of choice;
B raises issues scarcely addressed in the passage - that is, the negative aspects of elections.
D doesn't address the issue of choosing not to vote; though it notes that all citizens in other countries must vote, it neglects the main point - that Pakistanis don't have to;
E is irrelevant to the issue of free choice, stressing instead voter information.
The best choice is C, which addresses the major issue, free choice, and the author's specific point: the free choice not to vote.