Which Statement Describes Ethnic Conflict in China

Which statement describes ethnic conflict in China?

A) It is limited in scope because of the relatively small size and geographic isolation of the country's minorities.
B) It is becoming more serious in some areas where there is a large Islamic population.
C) It is most extensive in Tibet.
D) China has used the "war on terror" to justify its crackdown on certain separatist movements.
E) All of the above describe ethnic conflict in China.