All of the following are appropriate voice-of-customer methods except: ___
1) Ethnographic research that involves "camping out" with customers to observe them for extended periods.
2) Customer focus groups in which a group of customers respond to open-ended questions in an interactive manner.
3) Scanner data analysis in which the purchases of consumers are observed over a number of purchase occasions.
4) Netnography in which a firm listens to people as they blog, post items on bulletin board, or tweet.