Context: Google has announced the winners of it 's Android Developer Challenge . Just glancing through some of the winning apps , there are some REALLY good ideas in there . The most noble app I saw was one that examines your commutes and the like and gives you suggestions on how to become more carbon neutral ( carpooling , transit alternatives , etc ) . The app that grabbed my attention the most is one that lets you take a picture of a product 's bar code while in the store , and it will compare the product 's price in various other stores .

Question: Why would Google pick the app they did ?
Options:
0. They wanted to pick something entertaining .
1. They wanted to pick something playful .
2. They wanted to pick something traditional .
3. They wanted to pick something good for the environment .
Answer: 3