Compare the emergence of advanced civilizations in Meso and South America with the four early river valley civilizations. The calendars produced by both the Mayan and ancient Mesopotamian civilizations NEED ASAP WILL GIVE BRAINLIEST

a. were both accurate

b. are still used today

c. were based on the moon's cycles

d. never worked correctly

What enabled the drastic increase in us troop development to vietnam between 1964 and 1965?

By june 1943, the allies had regained control of north america. what was the advantage of controlling this region? what would you describe the axis's situation in europe in 1942? how might the axis have benefited by gaining control of great britain by 1942? the last questions of my quiz 10 points more than normal answer it honestly so i can get a good grade < 3

:) during the cold war, people were afraid of communists, both outside and inside the united states. the red scare and mccarthyism that grew out of these fears were damaging to the american way of life. during the mccarthy years, many of the freedoms guaranteed in the bill of rights were limited. write a paragraph explaining what lessons can be learned from the mccarthy era about what u.s. citizens need to protect in order to preserve the democratic political system and the american way of life.