选项A. Some chimps lower their cry to keep food away from others.意思是：一些猩猩降低叫声的音量，目的是不让其他动物知道它发现了食物。keep...away from使...远离

选项B. The losing chimp won the fight by taking the winner's hand.意思是：打斗输了的猩猩通过抓住胜者的手来赢得胜利。

你所说的倒数第三段最后一句你理解错了After a fight, the losing chimp will give its hand to the other. When the winning chimp puts out its hand, too, the chimps are friendly again. But an animal expert once saw a losing chimp take the winner's hand and start fighting again.意思是：打斗后，输 了的猩猩会把手递给对方。获胜方也会伸出手，两个猩猩便重归于好了。可是动物专家曾经看到过打输了的猩猩拉起胜方的手后，再次开打。

明白了意思，你还认为B对吗？