Earthquakes usually come without warning. What should you do if this happens to you? An earthquake is dangerous, but there are still things you can do to protect yourself.
Stay calm as the earth begins to shake. Your chances of survival (幸存；存活) in an earthquake go up if you can keep calm.
       You need to have something strong around you to protect you from falling objects. Do not stand near walls or windows and stay out of the kitchen. The kitchen is dangerous because of many glass objects.
       Stay away from buildings and trees. If you are in a car, pull over to a place where there are no trees or tall buildings and stay in the car. If you are close to the sea, try to get as far away from the water as possible. Earthquakes can cause huge waves that can really harm the people nearby.
       For example, gas fire often comes with an earthquake. If you see a fire, quickly move outdoors to an open area.
Remember to always hope for the best but prepare for the worst.

阅读以上短文，从文后表格中选出能填入空白处的最佳选项，使文意通顺、正确；根据短文内容回答第70小题。

What is the passage mainly about?

A．The ways to protect yourself when an earthquake happens.

B．The ways to stay away from tall buildings.

C．The ways to stay calm.

D．The ways to move outdoors to an open area.