21 根據ANA（1991）所公布的臨床護理執業標準，有關護理過程的步驟，依照先後順序排列，下列何者為是？
(A)Assessment→Diagnosis→Plan→Implementation→Evaluation
(B)Assessment→Diagnosis→Implementation→Plan→Evaluation
(C)Diagnosis→Assessment→Plan→Implementation→Evaluation
(D)Diagnosis→Assessment→Implementation→Plan→Evaluation