When a requirement arises during project execution that affects scope, schedule, or budget, the project manager must follow formal change control procedures. Procuring a server that was not part of the original baseline constitutes a change. Therefore, the correct action is to raise a change request and obtain approval before proceeding.

Option A bypasses change control protocols, which may lead to governance or audit issues.

Option B shifts the cost improperly without formal agreement.

Option C assumes the change is covered under contingency without verification.