Perry should try adjudication. Litigation is public so there would be no confidentiality. Out of the four options only adjudication would provide Perry with what he needs; a binding decision which is confidential. See p.146 for more information on litigation.

The correct answers are as follows:

This is negotiation - no third party is mentioned and there is a face-to-face meeting in private

Negotiation isn't an alternative dispute resolution because it's supposed to be the 'default' dispute resolution- the one you automatically do when a problem occurs. Only if negotiation fails should you turn to ADR. P. 142

The correct answers are as follows:

This is a warranty as it is a minor term. If the invoices aren't processed in 30 days this isn't a major breach- the supplier has said they'd be okay with it.

The correct answers are as follows:

This is mediation - there's a third party with no powers. The answer can't be negotiation as negotiation doesn't have a third party. The answer can't be litigation or arbitration as the third party here does have decision making power.