The A corporation has an operating profit margin of 20%, operating expenses of $500,000, and financing costs of $15,000. Therefore,

A. the corporation's gross profit margin is greater than 20%.

B. the corporation's net profit margin is greater than 20%.

C. the corporation's gross profit margin is less than 20%.

D. the corporation's gross profit margin is equal to 20% because gross profit is not affected by operating expenses or financing costs.