Who was the first european to round the southern tip of africa?

a. vasco da gama

b. bartolomeu dias

c. hernán cortés

d. ferdinand magellan

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