Concept:Electoral malpractice is any illegal or unethical act that corrupts the fairness of an election.
Explanation:Impersonation means voting in place of another person, which is malpractice.
Threatening involves intimidation of voters or candidates, which is malpractice.
Gerrymandering means manipulating electoral boundaries for unfair advantage, which is malpractice.
Campaigning for a candidate is a lawful and normal part of the electoral process.
Therefore, campaigning is not an electoral malpractice.
Answer:C. campaigning for a candidate