Win-lose approach is most likely to be associated with which of the following type of...

Distributive approach to negotiation used when the interested parties are attempting to divide something up or distribute something of value, also known as zero-sum approach or win-lose. Win-lose approach is useful when the relationship with the other party (TOP) is short-term and once-off.

The question mentions 4 types of relationship:

Adversarial: Both seek to maximize position at the expense of the other. Almost no trust, communication and cooperation. These suppliers will probably provide non-core products or services with the buyer purchasing them on a one-off basis.

Outsourcing relationship: Use competent suppliers to manage non-core businesses previously done in-house. Require high level of trust and collaboration

Partnership: Both work closely on long term development by sharing information, technology and ideas.High level of trust with the aim to benefit both parties (win-win)

Strategic alliance: Both parties identify areas where they could collaborate to create mutual benefits

Among these 4 types of relationship, only adversarial is once-off. Then it is the correct answer.