The researchers believe that the elephants’ emotional reactions are due to their different interpretations of the smells and the sights. Smelling a potential danger means that a threat is nearby and the best thing to do is run away and hide. Seeing a potential threat without its smell means that risk is low. Therefore, instead of showing fear and running away, the elephants express their anger and become aggressive.

　　72. According to the passage, which of the following statements is TRUE about Kamba and Maasai people?

　　A. Maasai people are a threat to elephants. B. Kamba people raise elephants for farming.

　　C. Both Kamba and Maasai people are elephant hunters.

　　D. Both Kamba and Maasai people traditionally wear red clothing.

　　73. How did the elephants react to smell in the study?

　　A. They attacked a man with the smell of new clothing.

　　B. They needed time to relax when smelling something unfamiliar.

　　C. They became anxious when they smelled Kamba-scented clothing.

　　D. They were frightened and ran away when they smelled their enemies.

　　74. What is the main idea of this passage?

　　A. Elephants use sight and smell to detect danger.

　　B. Elephants attack people who wear red clothing.

　　C. Scientists are now able to control elephants’ emotions.

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