A decision and three sets of information numbered I, II and III are given.

•  If the decision can be made by using any one of the three sets of information select A.
• If the decision can be made by using sets I and II together select B.
• If the decision can be made by using sets I and III together select C.
• If the decision can be made by using sets II and III together select D.
• If the decision can be made by using sets I, II and III together select E .

Decision : Eighty percent of students in a class attend tuition classes
I. Sixty percent of students attend tuition classes in several subjects including mathematics and science.
II. Twenty percent of students attend group studies organised among themselves.
III. Twenty percent of students attend only tuition classes in mathematics.