The Time of Its Introduction,which of the Following Products Was

the time of its introduction,which of the following products was the best example of a continuous innovation?

A) the Palm Pilot personal digital assistant (PDA)
B) the first video game system (Atari)
C) Breathe Right nasal strips, a sticky strip that is worn across the nose at night to help people with a stuffy nose to breathe better
D) Via Voice Gold voice-recognition software
E) Naturalpoint Trakir, which replaces the computer mouse by tracking head movements and then translating those head movements into cursor commands