The Practice of "Tracking" Can Be Described As

The practice of "tracking" can be described as:

A) dividing students into groups that receive different instruction on the basis of assumed similarities in ability or attainment
B) keeping tabs on students who have had run-ins with the law
C) the practice of cataloging where children are from and their immigration status
D) keeping a running account of the differences between boys and girls in core subjects such as math and English
E) when teachers maintain strict classroom discipline