單選題

The Youth Knowledge Network (YKN) is a smaller but

 (A) _equally_ active volunteer organization mainly

 (B) _is composed_ of college and high school students in Taiwan. It helps these young people learn and grow

 (C) _by_ serving in many volunteer projects. The YKN members have taught

 (D) _the elderly_ Net surfing and helped children in remote areas build up a connection

 (E) _with_ the outside world.