Progress in Constructing Multicultural Education Has Been Slow,for All of the Following

Progress in constructing multicultural education has been slow,for all of the following reasons EXCEPT

A) Cultural groups have not found common satisfaction in a specific curriculum.
B) Cultural groups tend to agree on a standard against which all should be judged.
C) Some argue it is more important to identify a common American culture.
D) There is disagreement over whether we should achieve the "melting pot" metaphor or recognize each identifiable group.