What year was Georgia's first constitution, adopted in Savannah, completed?

Georgia's first constitution was completed in 1777. This document, adopted in Savannah, was significant as it established the foundational principles of governance for the state following its declaration of independence from Great Britain. The 1777 Constitution outlined the structure of the government and addressed various issues related to governance, reflecting the ideals of the American Revolution and the shift towards a more democratic form of government.

The constitution established a bicameral legislature and a governor, among other key elements. The choice of 1777 reflects a critical period in Georgia's history as it was formative in delineating the powers and responsibilities of government in the new state, setting a precedent for future state constitutions.

The other years presented in the choices hold historical importance but are linked to different events in American or Georgia history. 1776 marks the year of the Declaration of Independence, while 1789 is notable for the ratification of the United States Constitution at the federal level. 1798 was a later date that does not relate to Georgia's initial constitution and instead corresponds to another context in state or national governance. Thus, 1777 is clearly the correct answer for the adoption of Georgia's first constitution.