Đáp án A.
Tạm dịch: …including serious air pollution, lengthy delays, and the greater risk ________ accidents: bao gồm ô nhiễm không khí nghiêm trọng, sự chậm trễ kéo dài, và nguy cơ tai nạn cao hơn.
- risk + of sth: nguy cơ, nguy hại.
Ex: Building work has a high risk of accident.
If boring and repetitive factory work could be (37) ________by robots, why not boring and repetitive household chores too?