Read the following paragraph from section “Thinking Ahead." There are also rules to keep Antarctica the way it is. Nothing can be taken home as a souvenir. Everyone has to get rid of their trash. People are not allowed to be near wildlife. The rule is that if the animal notices you, you are too close. What is the MAIN idea of this paragraph?
A.
Scientists cannot take anything from Antarctica home with them.
B.
It is important for scientists to throw away all of their trash.
C.
Antarctica has many animals that scientists must stay away from.
D.
There are several rules scientists must follow in Antarctica.