They do have a different to the problem of overpopulation.
A. solution
B. opinion
C. decision
D. conclusion
网友回答
(答案→)A. solution
B. opinion
C. decision
D. conclusion
解析：考查词义辨析。solution 解决方案，opinion 观点，decision 决定，conclusion 结论，句意：他们的确有一个不同的解决方案对于人口过多的问题。所以选A。