The Byzantine empire gained the most territory in the___ 
A. Thirteenth century, after the Crusades
B. Sixth century, when Justinian I was emperor
C. Fourth century, during the reign of Constantine
D. Ninth century, after the Iconoclast Controversy

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.