单选题 In order to limit the damage and to prevent some of the suffering resulting from earthquakes, scientists are working on ways to enable accurate prediction, Special instruments are used to help people record, for example, shaking of the earth. Scientist are trying to find methods that will enable them to indicate the exact time, location and size of an earthquake.
Certain phenomena have been observed which are believed to be the signs of imminent(即将发生的) earthquakes. These include strange behaviours of some animals, the changes in the content of mineral water, etc. The magnetic properties of rocks may also display special pattern before major earthquakes happen.
Signs of imminent earthquakes include all the following BUT

• A. strange behaviours of animals.
• B. changes in the content of mineral water.
• C. the magnetic properties of rocks.
• D. dramatic change in climat