Xray Company provided the following data for its two most recent years of operation: Sales Net operating income Average operating assets Stockholders' equity Residual income ROI 20X1 $750,000 $45.000 $250.000 $75,000 $15,000 18% 20X2 $900,000 $70,470 $320,000 $90,000 $40,000 22% Which one of the following is correct with respect to the 4% increase in ROI from 20x1 to 20x2? Multiple Choice There was an increase in margin and an increase in turnover. There was a decrease in margin and a decrease in turnover. There was an increase in margin but a smaller decrease in turnover. There was a decrease in margin but a larger increase in turnover