问题详情

According to the passage, the meaning of a message communicated through a pheromone may vary when the
A．chemical structure of the pheromone is changed
B．pheromone is excreted while other pheromones are also being excreted
C．exocrine glands do not produce the pheromone
D．pheromone is released near certain specific organisms请帮忙给出正确答案和分析，谢谢！