BoB CArriED out immEDiAtE trEAtmEnt AnD rEAssurED thE CliEnt thAt thE plAguE woulD not ______ BECAusE thE DrAinAgE systEm hAD BEEn rEplACED.
A．inCur
B．rECur
C．oCCur
D．CurB