Final answer:
An audit team uses checklists as the best tool to ensure all client disclosures are included in financial statements, as they provide a structured framework to cover all necessary points.
Step-by-step explanation:
The tool that is best used by the audit team to determine if the client has included all disclosures is d. Checklists. An audit checklist is a comprehensive list of items that auditors need to consider while performing an audit to ensure nothing is missed. This includes the disclosures that should be contained within the financial statements. While the management representation letter and inquiries of the CFO can provide evidence, checklists offer a structured way to verify that all disclosures have been made in accordance with applicable accounting standards such as GAAP or IFRS.