Question

what forced europeans to look for other routes east?
land routes were closed off by ottoman turks.
europeans were conquered by ottoman turks.
europeans lost interest in eastern products.
land routes no longer led to needed goods.

Explanation:

During the Age of Exploration, the Ottoman - Turkish Empire controlled key land - based trade routes to the East. They imposed high taxes and sometimes closed off the routes, which forced Europeans to seek alternative sea routes to access the valuable goods of the East.

Answer:

Land routes were closed off by Ottoman Turks.