In What Way Is Mediation Different from Arbitration and Litigation

In what way is mediation different from arbitration and litigation?

A) Mediation is free and does not require the assistance of a lawyer.
B) Mediation is time-consuming and tends to be ineffective.
C) Mediation results in an informal,non-binding decision.
D) Mediation involves the use of a neutral party to assist with resolution of the dispute.