Before the Fall of Constantinople in 1453,the Byzantine Empire Tried

Multiple Choice

Before the fall of Constantinople in 1453,the Byzantine empire tried to shore up its defensive position against the Ottoman Turks by:

A) restoring the ancient office of tsar (Caesar) .
B) forging a peace treaty with Ivan the Great.
C) submitting to papal (Roman) authority in religious matters.
D) equipping foot soldiers with hand-held firearms called muskets.
E) agreeing to a mutual defense treaty with England and France.