The correct option is C The government banning the formation of any new political party
The government can manipulate the election process in many ways. Some could be direct bans, like in the case of situation 1 and 2. It could reject the candidature of the opposition parties. It can even remove the names of the supporters of opposing parties from electoral rolls. In any of these cases, elections would not be considered 'free and fair'. However, campaigns are a normal part of the election process, and they are often monitored by an independent body to minimise the possibility of manipulation and fraud.