Explanation

In financial reporting, issuers typically provide less detailed disclosures about operating costs compared to revenue disclosures. This is because:

1. Revenue recognition is a critical area with complex accounting standards (such as ASC 606/IFRS 15) that require detailed disclosure about revenue streams, contract terms, performance obligations, and disaggregation of revenue.

2. Operating costs are often aggregated into broader categories (like cost of goods sold, selling, general and administrative expenses) without the same level of granularity required for revenue.

3. Regulatory requirements focus more on revenue transparency due to its importance in assessing a company's core business performance and potential for manipulation.

4. Competitive considerations - companies may be reluctant to disclose detailed cost structures that could reveal competitive advantages or disadvantages.

Therefore, option A is correct: operating cost disclosures are most likely less detailed than revenue disclosures.