15. Why did Europeans want to find an ocean trade route to East Asia after 1400? A. The old land routes were no longer safe and reliable.
B. They wanted to conquer China.
C. The Islamic Empire banned trade from Europe.
D. European spices were in great demand in China.

The old land routes were no longer safe and reliable- is the reason Europeans wanted to find an ocean trade route to East Asia after 1400.

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

c]extended voting rights to african americans