请选择ABCD7B7@2T-V'M+@6b,\*gThe bus tickets are much _____ than before.2x8w-x*v7B6c-`1S/P4e/b;?6U
A.cheap2x8w-x*v7B6c-`1S/P4e/b;?6U
B.cheaper2x8w-x*v7B6c-`1S/P4e/b;?6U
C.cheapest2x8w-x*v7B6c-`1S/P4e/b;?6U
D.the cheapest2x8w-x*v7B6c-`1S/P4e/b;?6U