Which of the following statements about preferred stocks is false?

	a.	Preferred stockholders have original selling prices and par value the same.
	b.	Companies normally call back preferred stock when market interest rates are low.
	c.	One of the features associated with cumulative preferred stocks is that dividends in arrears are paid to both preferred and common stockholders.
	d.	Convertible preferred stock has a minimal time frame for the holder to exercise the option.