Which of the following statements is correct? a. if a firm increases its sales while holding its accounts receivable constant, then, other things held constant, its days' sales outstanding will decline. b. there is no relationship between the days' sales outstanding (dso) and the average collection period (acp). these ratios measure entirely different things. c. if a security analyst saw that a firm's days' sales outstanding (dso) was higher than the industry average and was also increasing and trending still higher, this would be interpreted as a sign of strength. d. if a firm increases its sales while holding its accounts receivable constant, then, other things held constant, its days' sales outstanding (dso) will increase. e. a reduction in accounts receivable would have no effect on the current ratio, but it would lead to an increase in the quick ratio.