A ground detection system is shown in the illustration for a three- phase ungrounded distribution system. Which of the following statements describes the conditions indicated if a full ground occurs in line "A"?

A.Lamp "A" will burn brightly and Lamps "B" and "C" will go out.
B.Lamp "A" will burn brightly and Lamps "B" and "C" will burn dimly but not go out.
C.Lamp "A" will burn brightly and Lamps "B" and "C" will burn with normal intensity.
D.Lamp "A" will go out and Lamps "B" and "C" will burn brightly.

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