Mediation is a popular form of alternative dispute resolution (ADR) because:

A) it is purely voluntary
B) the mediator is typically someone who is in close day-to-day contact with all parties in the dispute
C) it is a less formal process than arbitration
D) it allows an employee to appeal a mediated decision that he or she deems to be unfair
E) it is only necessary when parties involved want to settle a dispute without litigation

Mediation is a less formal process than arbitration, making it a popular choice for parties who want to resolve a dispute without going to trial. A is not entirely accurate, as mediation can be court-ordered in some cases. B is not necessarily true, as the mediator may be an impartial third-party selected specifically for their ability to remain neutral. D is incorrect, as mediation decisions are typically binding and there is no appeal process. E is also incorrect, as mediation can be used even if litigation is already underway.