沉降药物的作用有（）

A.泻下

B.清热

C.重镇安神

D.收敛

E.止咳平喘

The risk components that need to be assessed in determining country risk premium for use in estimating the required rate of return for foreign securities include which of the following Ⅰ. Business risk Ⅱ. Financial risk Ⅲ. Liquidity risk Ⅳ. Exchange rate risk Ⅴ. Country risk（）

A. Ⅱ, Ⅳ and Ⅴ

B. Ⅲ and Ⅳ

C. Ⅰ, Ⅱ, Ⅲ, Ⅳ and Ⅴ