Final answer:
After gaining independence, Haiti's government was volatile, characterized by instability, authoritarian regimes, and frequent military coups.
Step-by-step explanation:
In the one hundred years after Haiti gained independence, the most accurate description of its government would be d) Volatile. Haiti experienced significant instability marked by corruption, political conflicts, and the lack of long-serving presidents during this period. Authoritarian rule was prevalent, with few leaders serving full terms. The United States' occupation and the corrupt regimes of Francois "Papa Doc" Duvalier and his son signify this turbulence. Furthermore, the democratic aspirations were frequently interrupted by military coups, underscoring the volatile nature of Haitian governance.