Explanation:

• Option A (Total leverage) is incorrect because total leverage measures the sensitivity of net income to changes in revenues, capturing both operating and financial leverage.
• Option B (Financial leverage) is incorrect because financial leverage reflects the variability of profits introduced by interest charges, i.e., the sensitivity of net profit to changes in operating profit.
• Option C (Operating leverage) is correct because it directly measures the sensitivity of operating profit (EBIT) to changes in revenues, which aligns with the question's requirement.