How many different answers did the question "Describe the conversation you had with your previous employer about your mental health, including their reactions and actions taken to address your mental health issue/questions." get?
SELECT COUNT(DISTINCT T1.AnswerText) FROM Answer AS T1 INNER JOIN Question AS T2 ON T1.QuestionID = T2.questionid WHERE T2.questiontext LIKE 'Describe the conversation you had with your previous employer about your mental health, including their reactions and actions taken to address your mental health issue/questions.'
database name:db_id mental_health_survey
Question table Question Cols: question text dtype text, question id dtype integer, 
Survey table Survey Cols: Survey ID dtype integer, Description dtype text, 
Answer table Answer Cols: Answer Text dtype text, Survey ID dtype integer, User ID dtype integer, Question ID dtype integer, 
