to DEAl with thE EvEr-inCrEAsing numBEr oF tourists From EuropE, thE shuttlE trAnsport CompAny hAs DECiDED to proviDE ______ Bus sErviCE on holiDAys.
(A) oFtEn
(B) rEAlly
(C) FrEquEnt
(D) mAny