问题详情

What is the aim of Cultural Survival, Inc. and its sister organizations？
[A] To teach people how to communicate with the outside world.
[B] To study the cultures of the modern world and some other societies.
[C] To help small and isolated tribes adapt to the modern world.
[D] To separate some societies from the modern world.请帮忙给出正确答案和分析，谢谢！