Explanation

A private company valuation conducted for tax reporting purposes is best classified as compliance-related because:

• Compliance-related valuations are performed to meet regulatory or legal requirements, such as tax reporting, financial reporting, or regulatory filings
• Tax reporting specifically requires valuations for purposes like estate taxes, gift taxes, or income tax compliance
• Litigation-related valuations involve legal disputes, such as shareholder disputes or divorce proceedings
• Transaction-related valuations are performed for actual business transactions like mergers, acquisitions, or financing

Therefore, option C is the correct classification.