What is the impact of treating sales returns and allowances as a contra revenue but treating sales discounts and credit card discounts as selling expenses? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a .Gross margin is reduced by sales returns and allowances, sales discounts and credit card discounts b C Gross margin is reduced by sales returns and allowances but all three accounts cause a decrease in profit from operations Gross margin is reduced by sales returns and allowance but operating profit is only reduced by sales discounts and credit card discounts. d Gross margin is reduced by sales discounts and credit card discounts but all three accounts cause a decrease in profit from operations. Unanswered 8 Save