假设某企业同时从事两项业务A和B。如果将A和B分别核算，那么A缴纳增值税，B应缴纳5%的营业税；但是如果企业未对两项业务实行分别核算，则A和B统一缴纳增值税。设Y是为B业务购入产品的价值所占比例。当Y大于（）时，B业务缴纳增值税的税负更轻。

A．65.59%

B．79.35%

C．65.35%

D．79.59%

It is not advisable to use nylon for alongside towing because it（）.

A.is too expensive for everyday towing usage

B.binds on the cleats

C.parts too readily

D.strethes too much