In the reign of William I,the（）were at the bottom of the feudal scale.

A.a trifling
B.the best-known
C.a horrifying
D.a sensational

A.the Norman barons
B.the Danes
C.the Irish
D.the Scots

A.William the Confessor
B.William Lion-Heart
C.the father of the British navy
D.William the Conqueror