失語症的治療可分成「歷程處理取向（process-oriented approach）」以及「功能性取向（functional approach）」，下列何者屬於「功能性取向」的治療方式？①confrontation naming drills ②conversational coaching ③Promoting Aphasics' Communicative Effectiveness（PACE） ④semantic feature analysis treatment ⑤situation-specific training ⑥supported conversation intervention