Which of the Following Is an Argument in Support of Tracking

Which of the following is an argument in support of tracking in schools?

A) Tracking is problematic because there are differences in the content of materials and the quality of instruction among different levels.
B) Tracking benefits students in the upper and lower tracks but does not provide benefits to students who are in a general track in between vocational and college-bound students.
C) Tracking benefits children with less-advantaged backgrounds,but only if their parents can advocate on their behalf to get them into college-preparatory tracks.
D) Children from higher social class backgrounds are more likely to be in college-preparatory tracks,even when other factors like achievement test scores are taken into account.