阅读短文,然后根据其内容从 A、B、C、D 中选出最佳选项。
It's time for school! But on May 14th, 170 students at Duncanville High School in Texas, US, were told to go back home.Why? Because they were wearing the wrong clothes to school. Schools in the US don't always ask students to wear uniforms. But they have dress codes(着装要求). For example, Duncanville High School tells students to wear belts, shirts without logos （标识）.Schools' most-hated clothes are different.
In 2011, the saggy ( 松垮的 ) trousers law was passed in Florida. It stops students from wearing trousers that show body parts.
Now, "the favourite new target ( 目标 ) of the school dress code" is leggings( 紧身裤 ), reported the Associated Press. Some schools don't allow leggings. Other schools ask students to wear a shirt or a skirt over leggings.
