______ is regarded as "the corner stone" of English history because it laid down the basic rules for the English legal system.

A．Date: Monday; Place: a Shiite Mosque; Casualties: 16 killed, 30 injured.
B．Date: Monday; Place: a house nearby a Shiite Mosque; Casualties: 17 killed, 30 injured.
C．Date: Sunday; Place: unknown; Casualties: 1 killed.
D．Date: Sunday; Place: a Shiite Mosque; Casualties: 17 killed; 30 injure

A．is too short to include great changes
B．is completely different from the old models
C．will try hard to keep its characteristic style
D．is not greatly different from the old models