A. to watch the most desirable goods B. to make films that can be used as evidence C. to frighten shoplifters by their appearance D. to be used as evidence against shoplifters 参考答案:B 答案解析:推断题。文章第三、四段指出.悬挂在天花板上的小球用于拍摄小偷作案时的情景,而拍有偷窃情景的录像带可以用做指证小偷的证据,所以B正确。虽然这些小球是用来拍摄犯罪场景的,但小球本身并不能作为证据指控扒手,