Liz and Moss disagree over the amount due under their contract. To avoid involving any third party in the resolution of their dispute, Liz and Moss might prefer to use the alternative dispute resolution method of

Negotiation

Explanation:

Liz and Moss disagree over the amount due under their contract. To avoid involving any third party in the resolution of their dispute, Liz and Moss might prefer to use the alternative dispute resolution method of  negotiation.

Alternate Dispute Resolution methods include arbitration, mediation and negotiation.

However of the 3 methods above arbitration and mediation involves the use of third party interference in the dispute resolution.

Therefore only negotiation is a viable means of alternate dispute resolution if the presence and interference of a third party is undesirable.

answer; intensive use of a sales force and is relatively costly;

answer; communication channel;