How did the German part of Charlemagne's kingdom change into the rule of Otto the great? A.) it was divided by several German dukes
B.) it fell under the rule of Byzantine empire
C.) it was invaded by Angelo Saxons
D.) it was United as one empire​

Amaster's degree candidate needs to conduct a research project for her master's thesis. she is interested in the types of junk food available to the public. she plans on going to the local convenience stores and asking the owners what types of junk food the store normally stocks and which are the biggest sellers. identifiers will not be collected. this study would fall under which of the following? a. expedited review b. exempt review c. full board review d. not human subjects