Final answer:
D) The 2008 financial crisis and housing market collapse
The 2008 financial crisis and housing market collapse had a profound impact on Georgia, causing significant economic distress and affecting many residents' livelihoods.
Step-by-step explanation:
The event that had the biggest impact on Georgia between 1990 and 2020 is subject to interpretation, but considering the significant nationwide effects, the 2008 financial crisis and housing market collapse can be seen as having a profound impact.
This crisis led to the Great Recession, during which many people lost their jobs and homes, affecting Georgia's economy and its residents deeply. The Atlanta Olympics in 1996 were also impactful, promoting international recognition and economic development.
Meanwhile, the election of Barack Obama as the first African American President in 2008 was a historical milestone with significant social and cultural implications.
However, focusing on economic impact specifically, the 2008 financial crisis stands out due to its immediate and long-lasting effects on the livelihoods of many Georgians.