Why were early villages only semi-permanent at first? A. People preferred moving B. Villages were unsafe C. The soil became depleted after some years D. There was not enough water

Hướng dẫn giải:

Đáp án đúng: C

Thông tin: Well, at first, the villages still had to relocate every few years as the soil became depleted. (Ban đầu, các làng vẫn phải di dời vài năm một lần vì đất đai bị bạc màu.)