We use which two terms interchangeably? (Select the best choice below.) O A. Gross profit and earnings before interest and taxes (EBIT) O B. Income from capital gains and operating income. O C. Earnings before interest and taxes (EBIT) and operating inco O D. Income after financing activities and operating income. The gross profit margin will increase when which of the following decreases: (Select the best choice below.) O A. depreciation expense OB. cost of goods sold O.C. interest expense OD. both A and B