TOEFL Listening: TPO-TOEFL阅读TPO - 415K5199M3M1TJNEN$

According to paragraph 6, during the eighteenth century, raccoons were abundant only in forests and wooded bottomlands of major rivers mainly because those were the only places where raccoons A. were relatively safe from conflict with humans B. had little trouble finding sufficient food C. had some protection from wolves D. could find a varied diet or prey