TOEFL Reading: ETS-TOEFL阅读机经 - R9W4662IR9W28T6EL$

According to paragraph 2, the abundance of wild cereals in the Natufian diet probably meant that the Natufians A. had to move their settlements more often B. needed to supplement their diets with salt C. found it easy to store their food supplies D. no longer needed meat to provide essential minerals