Sheffield Company Had $42,000 of Net Income in 2013

Sheffield Company had $42,000 of net income in 2013. Equity at the beginning of the year was $1,200,000 and at the end of the year was $1,600,000. Sheffield has no preferred stock. Please calculate the rate of return on common stockholders' equity. (Round to 3 decimal places.)

A) 0.035
B) 0.026
C) 0.030
D) 0.032