"We shall overcome" <span>written by Peter Seeger.</span>
Persians and Byzantines were already weak from fighting among themselves. <span />
<span>D. World leaders signed an agreement to never go to war again.</span>
Answer:
I believe it is the last one because I learned about this in seventh grade and the mayans were actually one of the first civilizations to create a 360-day year. forgive me if im wrong