What is one category of nomination identified by Keech and Matthews?

The correct answer is 'Consensus nomination' because this term refers to a type of nomination where broad agreement exists among party members or stakeholders regarding the candidate. In a consensus nomination scenario, the candidate is often someone who can unify different factions within the party, making this process smoother and less contentious. This category is significant because it highlights how certain nominations can promote party cohesion and stability, particularly in the context of primaries or general elections, where divisions might otherwise weaken a party's chances.

By contrast, the other options do not align as precisely with recognized terms in the nomination process. For example, a 'final nomination' may suggest a conclusion to the nomination process rather than a distinct category. 'Non-contested nomination' implies a lack of competition but does not convey the idea of consensus among various groups. 'Provisional nomination' suggests a temporary status, which contrasts with the idea of a candidate who is broadly accepted and supported. Therefore, 'Consensus nomination' captures the essence of a collaborative and unified approach to candidate selection within political parties.