Missing Word(s): 'project board'

C.

The missing word in the sentence is the entity or person who receives assurance from quality assurance that the project is being conducted appropriately.

Based on the given options, the correct answer is likely to be one of the project's governing bodies, which oversee the project's direction, scope, and management.

Option A, Project Manager, is a possible answer. The Project Manager is responsible for the day-to-day management of the project and is accountable for delivering it on time, within budget, and to the required quality. The Project Manager is likely to be the primary recipient of quality assurance.

Option B, Executive, is a possible answer. The Executive is the person or group that sponsors the project and provides strategic direction and oversight. The Executive is likely to be responsible for ensuring that the project delivers value and aligns with the organization's goals.

Option C, corporate or programme management organization, is a possible answer. The corporate or programme management organization is responsible for overseeing multiple projects or programmes within an organization. They are responsible for setting standards, providing guidance, and ensuring that projects align with the organization's strategy.

Option D, Supplier groups, is unlikely to be the correct answer as suppliers are external entities that provide goods or services to the project. They are not typically involved in the governance or oversight of the project.

In conclusion, based on the given options, the most likely answer is C, corporate or programme management organization. However, the answer could also be A, Project Manager, or B, Executive, depending on the specific context of the project.