iF A pArtiCulAr vACCinE is proDuCED only By onE CompAny At A singlE FACility, thErE is A possiBility thAt thE supply oF vACCinE CoulD grow ------- iF thE CompAny DECiDEs to CEAsE proDuCtion.
A．usElEss
B．inExpEnsivE
C．ABstrusE
D．rEpugnAnt
E．(E) sCArCE