TOEFL Reading: ETS-TOEFL阅读机经 - O14B5825V4DFHE37L$

According to paragraph 2, archaeologists make and use their own stone tools in order to A. find out how strong different types of stone tools are B. find out what kinds of tasks such tools were used for in ancient times C. study the copies under electron microscopes and to avoid damaging the originals D. show that ancient multipurpose tools were practical and easy to use