Which of the Following Does the Textbook Denote as a Possible

Which of the following does the textbook denote as a possible issue of concern for Taiwan's aboriginal population?

A) After thousands of years,many cultural groups have chosen to move to China to avoid urbanization of their native lands.
B) Many indigenous minority groups are now being absorbed into mainstream Taiwanese society.
C) The ongoing war between the mountain dwellers and the plains dwellers has led to an economic depression in Taiwan.
D) They have been forced out of their native lands into cities to participate in the urban culture.