Introduction:
A coalition government is formed when multiple political parties come together to form a government. It is a common occurrence in many countries around the world, especially in those with a multi-party system. Coalition governments have several features that make them unique and different from single-party governments. However, one of the features mentioned in the options is not a characteristic of a coalition government.

Explanation:
Common governance:
One of the key features of a coalition government is common governance. In a coalition government, multiple political parties share power and work together to govern the country. They collectively make decisions and implement policies. This is in contrast to a single-party government where one political party holds all the power.

Joint governance:
Another feature of a coalition government is joint governance. Since multiple parties are involved, decision-making and policy implementation are done collectively. Each party has a stake in the government and has a say in the governance process. This ensures that multiple perspectives are taken into account, leading to a more inclusive and diverse decision-making process.

Regulated by legal staff:
This feature mentioned in option C is NOT a characteristic of a coalition government. Coalition governments are not specifically regulated by legal staff. Instead, they operate within the legal framework and structures of the country. The legal staff, such as lawyers and legal advisors, may provide guidance and support to the government, but they do not regulate the functioning of the coalition government itself.

Pragmatism over ideology:
Another important feature of a coalition government is pragmatism over ideology. In a coalition government, parties with different ideologies come together for the purpose of governance. This often requires compromise and flexibility in order to find common ground and make decisions that benefit the coalition as a whole. Parties need to prioritize practical solutions and outcomes over strict adherence to their individual ideologies.

Conclusion:
In conclusion, the feature mentioned in option C, which is being regulated by legal staff, is not a characteristic of a coalition government. Coalition governments are characterized by common governance, joint decision-making, pragmatism over ideology, and the involvement of multiple political parties.