If three subzones in all are designated for retail use and a subzone in ... ...

If three subzones in all are designated for retail use and a subzone in Z2 is designated for housing, then which one of the following is allowed?
(A) Two subzones in Z1 are designated for housing.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Oct 2012 LSAT (PT67): Analytical Reasoning