The country’s populationsmall and most of its populationin the mountainous areas.A. are;

问题补充：

The country’s populationsmall, and most of its populationin the mountainous areas.

A. are; lives

B. are; live

C. is; live

D. is; lives

答案：

A. are; lives

B. are; live

(答案→)C. is; live

D. is; lives

解析：考察主谓一致，population作“人口”不可数名词，“人”可数名词，“这个国家的人口很小，大多数人住在山区。”答案C。