As the Ex-Dividend Date Passes

As the ex-dividend date passes:

A) the market price of the stock drops by about 150% of the amount of the dividend.
B) brokers suspend sales of the stock for two business days to avoid arguments between buyers and sellers over who gets the dividend.
C) an investor who purchases the stock prior to the ex-dividend date receives the dividend and an investor who purchases the stock after the ex-dividend date does not.
D) All of the above