What was a result of the crusades?
a. european conquest of the middle east
b. fall of the byzantine empire
c. rise of charlemagne's empire
d. growth of trade with the middle east

Is the weather changing? consider the data of severe weather that includes tornadoes occurring throughout the u. s. over the last four years. compare the severe weather for the last three years. then compare the first three months of 2017 with that data. based on previous years, what might the prediction be for weather during 2017?