What Improvement Did the Wisconsin Model Make on Measuring the Variables

What improvement did the Wisconsin model make on measuring the variables that influenced status attainment, following the pioneering work of Blau and Duncan?

A) The Wisconsin model considered social-psychological factors, such as the aspirations of parents for their children to do better than they did.
B) The Wisconsin model looked at finer structural details and nuances that Blau and Duncan omitted.
C) The Wisconsin model considered many factors, even teacher favoritism, in what influenced children to succeed.
D) The Wisconsin model scientifically measured vicarious desires and projections.