TOEFL Reading: ETS-TOEFL阅读机经 - QF8696WVT7XD3K25L$

Which of the following questions about the IKung is answered in paragraph 3? A. Are the IKung rare among today's hunter-gatherers in using stone tools? B. Is the social structure of the IKung more complex than that of most hunter-gatherer societies? C. Does the IKung's use of several styles of stone tools have a social function? D. Do the IKung use stone tools other than spear points?