Which one of the following, if substituted for the constraint that the ... ...

Which one of the following, if substituted for the constraint that the house in Riverton must be shown either first or second, would have the same effect on the order in which the houses are shown?
(A) The house in Riverton cannot be shown fourth.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in PT72 (Jun 2014): Analytical Reasoning