Arrange the steps involved in grievance redressal under the Consumer Protection Act in the correct sequence:
(A) Filing of a complaint in the appropriate commission
(B) Appeal to a higher authority if dissatisfied
(C) Mediation, if parties agree
(D) Final decision by the commission
1
(A), (C), (D), (B)
2
(A), (D), (C), (B)
3
(C), (A), (B), (D)
4
(B), (A), (C), (D)