Q22:

The violent crime rate (number of violent crimes per 1,000 residents) in Meadowbrook is 60 percent higher now than it was four years ago.  The corresponding increase for Parkdale is only 10 percent.  These figures support the conclusion that residents of Meadowbrook are more likely to become victims of violent crime than are residents of Parkdale. 

The argument above is flawed because it fails to take into account

1. changes in the population density of both Parkdale and Meadowbrook over the past four years

2. how the rate of population growth in Meadowbrook over the past four years compares to the corresponding rate for Parkdale

3. the ratio of violent to nonviolent crimes committed during the past four years in Meadowbrook and Parkdale

4. the violent crime rates in Meadowbrook and Parkdale four years ago

5. how Meadowbrook’s expenditures for crime prevention over the past four years compare to Parkdale’s expenditures

答案是D,为什么不是B呢

这类比例的题目需不需要考虑分母的问题,我一直搞不明白

嗯，明白了，多谢！！！