by the advances in technology many farmers have set up wind farms on their land.A. Being

问题补充：

by the advances in technology, many farmers have set up wind farms on their land.

A. Being encouraged

B. Encouraging

C. Encouraged

D. Having encouraged

答案：

A. Being encouraged

B. Encouraging

(答案→)C. Encouraged

D. Having encouraged

解析：本题考查非谓语动词。句中逻辑主语为farmers，与encourage为被动关系，表示受到鼓励，故选C。