Customers’ demand has great _________ on the prices, that is, it ______ the market.[ ]

A. effects; effects

B. affects; affects

C. effects; affects

D. affects; effects

中医学中“证”的概念是

A．对疾病所表现症状的综合认识
B．对疾病症状与体征的分析过程
C．机体在疾病过程中的某一阶段的病理概括
D．对疾病症状与体征的调查过程
E．阴阳失调的表现