What does the word 'they' in paragraph 4 refer to?

Câu hỏi :

What does the word "they" in paragraph 4 refer  to?

A. fusion and solar energy

B. clean energy technologies

C. masters

D. 26th - century humans

* Đáp án

D

* Hướng dẫn giải

Dẫn chứng: Wielding such power, 26th-century humans will be masters of clean energy technologies such as fusion and solar power. Furthermore, they'll be able to manipulate planetary energy in order to control global climate. 

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