A、Dropout rates are a major obstacle for local economies. B、Dropouts suffer greatly in their later lives. C、The dropout rate is

W: (19)A group called Alliance for Excellent Education finds current US dropout rates are a major drag on local economies. Michael is from the group and he’ll go deeper into it.
M: Yes. We used financial software to calculate the economic impact overall. The class of 2008 saw 600 000 kids drop out.
W: So what would have happened if that number was cut in half?
M: (20)There would be $4 billion in increased earnings. And all that earnings would result in increased spending and investing, which would be enough to support 30 000 new jobs at a time.
W: That’s a surprising number! And it will add up to a tax revenue of...
M: (20)State and local tax revenue would rise by $ 0.5 billion.
W: But the study shows just getting a diploma boosts the economy, right?
M: It is an incredible resource that is right there for us. Whether we have kids or not, whether we are car dealer, realtor (房地产经纪人). or a bank manager, we all benefit from a lower dropout rate. Right now there are 7 000 kids estimated who drop out of school every day.
W: So you agree with it?
M: Well, (21)I think the report underscores the notion that the best economic stimulus package is a high school diploma.
W: All right. So, what cities have the potential to add the most jobs if kids actually stay in school?
M: Well. (22)L. A., we are talking about 4 700 jobs; New York City, more than 3 000; Miami, nearly 2 000. So these are cities that certainly would benefit, all the people who live in them would benefit as well.
19. What does Alliance for Excellent Education find according to the conversation?
20. What does the statistics provided by the man show?
21. According to the man. what does the report emphasize?
22. Which cities will benefit if kids actually stay in school according to the conversation?