阅读下列短文，从每题所给的几个选项中，选出最佳选项。

　　Every day in China, about 200 million children go to school．Many of them take school buses．

　　Last year, a serious school bus accident happened in China, when a nine－seat minibus crashed．There were 62 children inside, and 21 of them died．To stop such accidents, the Center Government decided to strengthen(加强)the rules for school buses．

　　On April 5, the Government published new rules about school safety．These new rules are much stricter than the old ones．

　　Under the new rules, local governments must make sure that students attend nearby schools or boarding(寄宿的)schools to reduce traffic risks(风险)．Also, local governments must help kids in the countryside reach their school buses．

　　From now on, school buses have a speed limit(限速)of 80km per hour on highways and 60km per hour on normal roads．While on the road, other cars must let school bus go first．

　　The new rules also say that school buses must never be overloaded(超载)．

　　There are many other rules as well．A school bus must have than seven seats．On each bus, there must be at lest one adult(成年人)to keep an eye on the kids．Each school bus must have a fire extinguisher(灭火器), a first aid kit(急救箱)and a GPS．

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