Select all that apply. The Paris Peace Accords .

were signed before the Easter Offensive
ended U. S. military involvement in Vietnam
were not signed by the United States
were signed on January 27, 1973

The Paris Peace Accords were signed on January 27, 1973

Explanation:

the correct answer is

d) rocket launcher

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).