What other factors led to tension in American society during the 1950s and early sixties? What did some see as the cure?

Me i really need which of these was an accomplishment of the han dynasty? the invention of the seismograph finding a water passage to europe the invention of the ballpoint pen the invention of the abacus

Which is a result of the free exercise clause? parents can prevent their children from being vaccinated. people with a religious objection to military service cannot be drafted. businesses that sell religious materials can be open only on sundays. amish children do not have to attend school past the eighth grade.

How were the economies of the inca empire and ancient river valley civilizations such as egypt and phoenicia different?