FEw pEoplE in thE unitED stAtEs lost thEir livEs BECAusE _________.
A．thE tEmpErAturE wAs still EnDurABlE
B．pEoplE rEmAinED in Air-ConDitionED rooms
C．EFFECtivE mEAsurEs hAD BEEn tAkEn to rEDuCE thE hot tEmpErAturE
D．Air-ConDitioning units somEtimEs FAilED to work propErly