Blue Spruce Corp. had net income of $115500 and paid dividends of $36000 to common stockholders and $15000 to preferred stockholders in 2020. Blue Spruce Corp.s common stockholders' equity at the beginning and end of 2020 was $405000 and $600000, respectively. Blue Spruce Corp's return on common stockholders' equity is O 24.0%. O 15.0%. O 20.0%. O 19.0%