Critics of "Percent Plans" in Which the Top X Percent

Critics of "percent plans" in which the top x percent of the graduates of each high school is automatically admitted to campuses in the state's university system

A) say the plan achieves its aims only because all public high schools in a state have pretty much the same mix of race and ethnicity
B) say it achieves its aims because all of a state's colleges and universities have strong outreach plans to encourage black and Hispanic minorities to apply to the elite schools in the system
C) say it is unfair to students who are competing in school s with very high achievers because a student with better credentials than a student who stands well in a poorly achieving school would be excluded because he had lower standing in a class of high achievers
D) say the net gain in minority admissions is too great than would be expected by chance