iTunes Connect: " Do you want to restrict this binary to a specic platform?"

On the Review page , it showed the app is compatible with both iPhone and iPod Touch.
But I had not tested my application on any iPod Touch yet. Only I tested my app on iPhone 3G.

Following are my questions related to the issue:
i) On what device does the Appstore will test the application ? iPhone or iPod and also what is the iPhone OS they will test on.(as far as I think it should be iPhone OS 3.0).

ii) On what device my application will be shown, both on iPod Touch with wifi and iPhone OS greater than 3.0 or any other restriction will be made as per my information above.

Any sort of small information would be fruitful for satisfaction. Thanks in advance