Final answer:
A Completer Finisher is most likely to perform quality assurance in Dr. Belbin's Team Roles due to their attention to detail and thorough nature.
Step-by-step explanation:
According to Dr. Belbin's Team Roles, the role most likely to perform quality assurance on the team's contributions is a Completer Finisher. Completer Finishers are the individuals who are most effectively utilized in roles that require attention to detail and a thorough approach to work tasks. They are typically the ones who see potential errors and omissions and who are predisposed to dotting 'i’s and crossing 't’s within the team's output, ensuring that everything is of the highest quality before completion.
On the other hand, a Monitor Evaluator is more analytical and critical, making balanced decisions, while a Resource Investigator is good at developing contacts and negotiating with outsiders, and a Teamworker helps by supporting and facilitating the work of others. None of these roles inherently focuses on quality assurance like the Completer Finisher does.