One of the Most Interesting Issues with the Four-Fifths Rule

One of the most interesting issues with the four-fifths rule is that

A) most employers find it uninterpretable.
B) efforts to recruit minority group members reduce the percentage hired from that group.
C) typically less than four-fifths of the applicants for a given job are minorities.
D) numerous legal loopholes in the rule result in more discrimination than took place before its adoption.