Which position did serfs have in feudal society?
a.) they were slaves and could be bought and sold by lords =(
b.) they often could rise in class to nobles
c.) they could not leave the manor without the permission of their lords
d.) they owned the lands on which they worked

Consider the events in alfred wegener's life that led to his development of the continental drift hypothesis. review the items below and determine whether each item is (1) an observation that led alfred wegener to develop his continental drift hypothesis, or (2) evidence wegener gathered to support his proposal.