When someone refers to "The Fall" they are referencing the time at which Adam and Eve disobeyed God and fell into sin, hence the name, and were subsequently cast out of the Garden of Eden. So, the answer to your question would be C. Adam and Eve's removal from Eden.
Christopher Columbus accidentally discovered The Americas after taking 4 trips across the Atlantic Ocean. He tried to find a route from Europe to Asia.
"The experience of the First World War greatly changed the relationship between Europeans and colonized peoples because the war showed that Europeans needed colonial troops to fight their wars."
