What Is a Stock's Book Value

What is a stock's book value?

A) the current price of a share of stock in the stock market
B) the average price of one share of stock over the past year
C) the face value of a share of stock, set by the issuing company's board of directors
D) the value of a common stock expressed as total stockholders' equity divided by the total number of shares of stock issued
E) the value of a preferred stock as expressed by the number of stock shares issued by the board of directors