How do we know the olmecs were technically advanced?
a. they created the first version of a calendar
b. they invented tools using stones and metal
c. they used latex from trees to create rubber
d. they were the first to use a writing system

Which is true about the monroe doctrine?

How does the supremacy clause of the u.s. constitution affect the states? o a. it requires each state to establish a supreme court. b. it declares that the federal government can take away state powers if necessary. o c. it allows state governments to overthrow the federal government if necessary. o d. it ensures that the u.s. constitution overrules each state constitution

Did the both the us and ussr have atomic weapons after 1949