How can a historian determine whether a claim is valid?
a. determine if it shows a point of view
b. apply her own biases to interpret it
c. make sure it is not a counterclaim
d. evaluate the evidence used to support it

Which of the following explains why scarcity is a basic fact of life a. demand will always be greater than supply b. technology has not advanced far enough yet c. there will always be too many people on earth d. people cannot make good allocation decisions