SAT填空题 急 在线等········

SAT填空题 急 在线等········
OG上的一道题,
A dictatorship ------- its citizens to be docile and finds it expedient to make outcasts of those who do not ------- .
A.forces ..rebel
B.expects ..disobey
C.requires ..conform
D.allows ..withdraw
E.forbids ..agree
题解中有这样一句话,The tendency to withdraw is less likely,because people who are out of sight might also be out of the dictator's control；also,it is illogical to make outcasts of everyone who does not withdraw,so choice D can be eliminated.
这解释的逻辑就没看懂,withdraw到底是什么意思?是撤退的意思吗?怎么和out of sight说到一块去了?
为什么说make outcasts of everyone who does not withdraw是不合逻辑的?