NewcomerstosouthernCaliforniaaresurprisedtodiscoverthat,inspiteofthetemperateclimate,heatingbillsareashigh,orhigherthan,thoseinmostMidwesternoreasterncities.（）
(A)ashigh,orhigherthan,thosein
(B)ashigh,orhigherthan,
(C)ashighas,orhigherthan,
(D)atleastashighasthosein
(E)nolowerthan