Which of the Following Characteristics Apply to Trading Before and After

Multiple Choice

Which of the following characteristics apply to trading before and after regular hours?
I. Stock prices can vary from one ECN to another ECN.
II. Most brokerage firms require individual investors to place only market orders for after-hours trades.
III. The NYSE offers after-hours trading at that day's closing prices.
IV. After-hours markets tend to be more volatile and less liquid than the regular trading sessions.

A) II and IV only
B) I, II and III only
C) I and IV only
D) I, III and IV only