According to Choe's hypothesis，
A.the“I'm dead”chemical leaves the body of an ant when it dies．
B.an ant still smells like a living one when it dies．
C.an ant gives off a new chemical when it dies．
D.the“I'm not dead yet”chemical leaves the body of an ant when it dies．

A.the“I'm
B.
B.an
C.
C.an
D.
D.the“I'm

【参考答案】

D
解析：短文第六段第一句提到“崔指出，当一只阿根廷蚂蚁死后，发出‘等等，我还没死呢’这一信号的化学物质立刻消失”，故选D。