Here are the answers to your questions:
Question 1: What was one impact of the Yellow River flooding on Chinese society?
Answer: B) Death and property loss
Question 2: What is a major environmental issue caused by air pollution in China?
Answer: C) Poor air quality and health problems
Question 3: What is a potential consequence of air pollution in China?
Answer: B) Increased public health issues
Question 4: Which of the following could be a solution to air pollution in China?
Answer: C) Promote renewable energy sources