What was the most common answer for the question "What country do you work in?"?
most common answer refers to AnswerText where MAX(COUNT(AnswerText(QuestionID = 3)))
SELECT T1.AnswerText FROM Answer AS T1 INNER JOIN Question AS T2 ON T1.QuestionID = T2.questionid WHERE T2.questiontext = 'What country do you work in?' GROUP BY T1.AnswerText ORDER BY COUNT(T1.AnswerText) DESC LIMIT 1