Over time, housing shortages caused by rent control

A、a.increase,becausethedemandfor,andsupplyof,housingarelesselasticinthelongrun.;
B、b.increase,becausethedemandfor,andsupplyof,housingaremoreelasticinthelongrun.;
C、c.decrease,becausethedemandfor,andsupplyof,housingarelesselasticinthelongrun.;
D、d.decrease,becausethedemandfor,andsupplyof,housingaremoreelasticinthelongrun.