Isabella Spent One Hour Studying Canadian History Prior to 1800,and

Isabella spent one hour studying Canadian history prior to 1800,and then spent one hour studying European history prior to 1800.Victor spent one hour studying Canadian history prior to 1800,and then spent one hour studying calculus.What is likely to occur

A)  Both students will have equivalent recall of events in early Canadian history. 
B)  Isabella will have better recall of events in early Canadian history. 
C)  Both students will have almost no recall of the material studied during the second hour. 
D)  Victor will have better recall of events in early Canadian history.