How to: Create a Single or Multiple Choice question with a long list of replies ?

Datafield provide the possibility to provide mobile respondents with a (very) large number of replies to pick from. Let's say you need mobile respondents to select from a list of all US cities or from the list of all your retail store, simply create a single Choice question or Multiple Choice question and hit the + button to import a .txt file containing all possible choices. 

See below screenshot tutorial for more details: 

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