summarize why judith herrin believes the fall of constantinople was a turning point for western history.

a ) scholats fled with knowledge that sparked the renaissance in europe.
b ) it led to the voyages of discovery by columbus because trade was blocked.
c ) it marked the beginning of the third rome in europe.
d ) it meant that cannons would not work for sieges in the future.

According to Judith Herrin, the fall of Constantinople was a significant turning point for Western history for several reasons. She argues that the event led to the migration of scholars who carried valuable knowledge, which played a crucial role in sparking the Renaissance in Europe. Additionally, the blockage of trade routes following the fall of Constantinople forced Europeans to seek alternative routes, ultimately leading to the voyages of discovery by explorers like Christopher Columbus. The fall of Constantinople also marked the beginning of the concept of the "third Rome" in Europe, shaping the geopolitical landscape of the continent. Lastly, Herrin suggests that the use of cannons during the siege of Constantinople highlighted their effectiveness, changing the way future sieges would be conducted.