Statement: The Principal instructed all the teachers to be careful in class because some students may disturb other students.
Assumptions:
1. The teachers will handle the situation properly and they will point out the naughty students.
2. The students will welcome the decision of the Principal.
Answer: E
Clearly, teachers have been instructed to maintain discipline in the class and point out the naughty students who do not let other students study. So, I is implicit. Besides, the implementation of the instructions would surely help good students to concentrate on their studies and ensure a good working atmosphere in the class. So, II is also implicit.