His first book ______ next month is based on a true story.                       

A．published

B．to be published

C．to publish

D．being published

若规定向东方向为位移的正方向，今有一个皮球停在水平面上某处，轻轻踢它一脚，使它向东做直线运动，经5m与墙相碰后又向西做直线运动，经7m后停下．则上述过程中皮球通过的路程和位移分别是（　　）

A．12m；2m

B．12m；-2m

C．-2m；2m

D．2m；2m