HOTSPOT
A school has 200 students and 10 classes. Each class has 20 students. Each class has one teacher. The
school has five administrative staff members.
You need to design an Exchange Server 2013 organization for the school. The design must meet the
following requirements:
Students must be able to view only the email addresses of the other students in their class, the
teacher of their class, and the entire administrative staff.
Teachers must be able to view only the email addresses of the students in their class, all of the other
teachers, and the entire administrative staff.
The administrative staff must be able to see the email addresses of everyone.
Everyone will use Microsoft Outlook 2013 to view a list of all the users.
You need to identify the minimum number of address lists, global address lists, Offline Address
Books (OABs), and address book policies required for the design.
How many of each should you identify? (To answer, select the appropriate numbers in the answer
area.)
Answer: 
Can anyone provide an explanation on this one?
I can explain the address book policies by 1 per class (10) then 1 for all the teachers. So that gives you 11, you do not have to create one for admin staff as they need to see everyone.
Address lists again 1 per class (10), 1 for all the teachers (1) then 1 including everyone (1)
the other 2 i’m not sure about.
I am extremely confused by this question as well. Why would you create 21 global address lists when you’re only creating 12 address lists? Same with OABs.