Which of the Following Statements About the Supply of Labor

Which of the following statements about the supply of labor is correct?

A) It is perfectly inelastic at whatever quantity individuals are willing to work.
B) An individual's supply of labor curve is always upward sloping, like the supply curves of other items.
C) It is perfectly price elastic at the current wage rate.
D) An individual's supply of labor curve can bend backwards.
E) The supply of labor curve is shaped like an upside-down U.