DV: is the abbreviation of English Digital Video, which means Digital Video Camera.
DC:Digital Camera. Cameras with CCD or CMOS as the light-sensing element can be called digital cameras.
TV card: is through the PC to see the TV, the computer as a digital video recorder, not only can watch TV can also be converted to video tapes through the AV interface ha into MPEG format, burned into a VCD / DVD
MP3: full Moving Picture Experts compression standard Audio Layer 3 (Moving Picture Experts Group Audio Layer III). Audio Layer III). It is one of today's more popular digital audio coding and lossy compression formats, which is designed to dramatically reduce the amount of audio data
So choose C.