Answer:
b. 14.0%
Explanation:
NET INCOME Â
Sales  $ 100.000
Net Income  $ 25.000
Preferred Stock  -$ 4.000
Net Income to Stockholders' equity—common $ 21.000  14%
Net Income to Stockholders     $ 21.000
                           ===========  =  14%
Stockholders' equity—common   $ 150,000