---I think _______ask Tim for some advice.

---_______. Last time when I turned to him, he refused to help.

A．you'd rather; I think so

B．you'd better; I'd rather not

C．you have to; I'd rather not

D．you'd better; I think so

甲企业生产的A品牌瓶装矿泉水和乙企业生产的B品牌瓶装矿泉水都在同一地区的市场上销售，他们之间的竞争关系是()。

A.互为品牌竞争者 

B.互为产品形式竞争者 

C.互为产品类别竞争者 

D.互为愿望竞争者