The Pedometer Is Getting Kicked Up a Notch with the New

The pedometer is getting kicked up a notch with the new Fitbit device.The Fitbit is a $99 motion-detecting sensing device that can measure the user's activity even when asleep.It digitally records the distance a user walks or runs,right down to the number of steps,and calories burned.The device wirelessly sends data to its Web site,fitbit.com,giving users minute-by-minute details.Users can add consumption information at the Web site,allowing an accurate picture of calorie consumption and expenditures.Unlike other devices,like the Nike + iPod Sport Kit that monitors walking and running and sells for $29 or the Zeo Personal Sleep Coach that records brainwaves while the user is sleeping and sells for $399,the Fitbit combines both functions.The first-time Fitbit setup isn't very easy for users,but once over that hurdle,it's relative easy to use.
-Refer to Fitbit.In terms of the new-product development process,Fitbit's availability in retail stores and online is the _____ stage.

A) idea screening
B) idea generation
C) business analysis
D) test marketing
E) commercialization