The A corporation has an operating profit margin of 20%, operating expenses of $500,000, and financing costs of $15,000. Therefore Select one: O a.) the corporation's gross profit margin is equal to 20% because gross profit is not affected by operating expenses or financing costs ob. the corporation's gross profit margin is less than 20%. c. the corporation's net profit margin is greater than 20%. d. the corporation's gross profit margin is greater than 20%