Mary bought 100 share of Ford Motor Company stock in 2008 at $40 per share. It is now values in 2010 at $50 per share. How much tax liability will Mary have when she submits her 2010 tax forms to the federal government?
A. The applicable tax rate on the $5,000 value of the stock.
B. She would only be taxed on the $4,000 value of the original stock purchase.
C. No tax liability would exist if Mary didn't sell the stock and Ford hadn't given dividends to its stockholder.
D. The applicable tax rate on $1,000 of capital gains because the stock is worth more now.