Concept:This is a sentence rearrangement question about the feudal system set up by William I after the Norman Conquest.
Explanation:S1 says that William I distributed land to
180 Norman nobles.
S naturally follows because it tells us that these same nobles became the king’s chief tenants and owed him military help.
R then explains how they fulfilled that duty: they were expected to provide a fixed number of knights to the king.
Q comes next because the nobles began giving some of their own land to knights, who would serve them just as the nobles served the king.
P adds an important restriction with “however”: these knights could not be used for private warfare because it was forbidden in England.
This sequence leads logically to S6, which says that Anglo-Saxon peasants became tenants under different levels of landholders.
Therefore, the correct order is S, R, Q, P.
Answer:The correct sequence is SRQP, which is option D.