A school is developing a program to keep track of information about students and their class schedules. In which of the following instances would a data abstraction be most helpful?.

In order to take a test,the college board requires a form of identification. these strict rules are in place to keep people from taking other people's test. 

Loss in amenity , biodiversity , which are most difficult to assess

With any turning vehicle, the rear wheels follow a shorter path than the front wheels. the longer the vehicle is, the greater the difference will be. truck drivers initially swing out before making a turn. what isn't shown in this illustration is as car straightens out, the front wheels must travel a greater distance and the tail end drags on the shortest path.

Improved travle between colonies and africa