(2014·巢湖高三检测)—It is reported on TV this morning that a group of college students went on an exploration in Huangshan，________ in the mountain because of their losing the way.
—Yes，I know.Worse still，in order to rescue them，many soldiers went to help，________ one of them to lose his young life.
A. trapped；caused B. trapping；causing
C. trapped；causing D. trapping；caused