單選題

Volunteers are caring and selfless people

 (A) _from_ all ages, genders, occupations, and nationalities. You

 (B) _must have heard_

 (C) _touching_ stories about the volunteers

 (D) _who_ helped victims of natural disasters. They

 (E) _rushed to_ help the victims after the 1999 earthquake in Taiwan, the 2004 Asian tsunami, and the 2008 earthquake in Sichuan.