On December​ 31, Mercury Corporation has the following data​available: Net Income ​$200,000 Interest expense ​20,000 Preferred dividends ​20,000 Total assets at the beginning of the year​850,000 Total assets at the end of the year ​780,000 Total common​stockholders' equity at the beginning of the year ​550,000 Total common​ stockholders' equity at the end of the year ​490,000 What is return on common​ equity?A 42.31%B 38.46%C 22.09%D 34.62%