Over a Period of Thirty-Odd Years in Managing Investment Funds,Benjamin

Over a period of thirty-odd years in managing investment funds,Benjamin Graham used the approach of investing in the stocks of companies where the stocks were trading at less than their working capital value.The average return from using this strategy was approximately ______.

A) 5%
B) 10%
C) 15%
D) 20%
E) none of the above