The correct option is C Sending letters to newspapers to express concern over major government decisions
Television, radio, newspapers and the internet can be considered as media tools to express opinions. Similarly, forming NGOs and creating new political parties are both great ways of expressing popular aspirations and participating in the democratic process.
However, casting multiple votes, stuffing the ballot, tampering with the Electronic Voting Machine, and coercing voters are all unethical practices, and would go against the ideal of holding free and fair elections.