阅读下列短文，从每题所给的四个选项（A，B，C和D）中，选出最佳选项。
A
An explosion on Thursday killed one and injured 21 in a busy street in Tongren, Southwest China’s Guizhou Province.
The bomb was hidden in a rubbish bin in the city’s commercial hub（商业中心），where lots of shops and restaurants are concentrated.
The ear-splitting blast was heard around 12∶50 p.m.，said a local newspaper, citing witnesses. The power of the blast shattered（使粉碎）nearby shop windows and ripped the stainless（不生锈的）steel rubbish can to pieces.
One passer-by，identified（确认）only as Zhang，said she was shocked by the noise and saw a lot of pedestrians lying on the ground when she got to the scene.
Thirteen of the injured were taken to a local hospital after the explosion. A doctor there said five were in serious condition but already out of danger after emergency treatment. The othe
