The correct answer is option 'C' - the leaders of Belgium have amended their constitution four times.

Explanation:
Belgium is a country located in Western Europe and has a constitutional monarchy. The Belgian Constitution is the supreme law of the country, defining the structure and powers of the government. Over the years, the leaders of Belgium have made several amendments to the constitution to adapt to changing circumstances and address various issues.

1. First Amendment:
The first amendment to the Belgian Constitution occurred in 1893. This amendment aimed to extend the right to vote to all adult men, expanding suffrage and promoting democracy in the country.

2. Second Amendment:
The second amendment took place in 1920 and was a significant milestone in Belgian history. It granted voting rights to women, recognizing their equal participation in the democratic process.

3. Third Amendment:
The third amendment occurred in 1970 and was a response to the growing divide between the Dutch-speaking (Flemish) and French-speaking (Walloon) communities in Belgium. This amendment decentralized the Belgian state and granted more autonomy to the regions and communities within the country.

4. Fourth Amendment:
The fourth and most recent amendment to the Belgian Constitution happened in 1993. This amendment further strengthened the decentralization process by granting more powers to the regions and communities. It also expanded the scope of human rights and added new provisions related to the European Union.

These four amendments reflect Belgium's commitment to democratic principles, equal rights, and the evolving needs of its diverse population. Through these amendments, the leaders of Belgium have strived to maintain a balance between central governance and regional autonomy, ensuring the stability and unity of the country.

In conclusion, the leaders of Belgium have amended their constitution four times to address various issues, expand suffrage, promote democracy, and accommodate the linguistic and regional diversity within the country.