In 476 ad. the western roman empire fell while the eastern roman empire continued to flourish. when did the eastern roman empire finally collapse

a. 500 ad

b. 784 ad

c. 1066 ad

d. 1453 ad

In 476 ad. the western roman empire fell while the eastern roman empire continued to flourish. eastern empire finally colapsed in 1453 when it was conquered by the Ottoman Empire and Constantinople was taken