Final answer:
As a result of Morgan's 30-day experiment eating only McDonald's food, his liver experienced liver damage and fatty buildup.
Step-by-step explanation:
Morgan Spurlock conducted an experiment in which he ate only McDonald's food for 30 days. As a result, his liver experienced liver damage and fatty buildup. This was due to the high levels of fat, cholesterol, and processed food that are typically found in fast food. These unhealthy components can lead to a condition called non-alcoholic fatty liver disease (NAFLD), where fat accumulates in the liver and can impair its function.