Which research question would be most appropriate for a four- to five-page research paper? what causes childhood obesity? should the government impose restrictions on what kinds of foods can be served in school cafeterias? how do french fries affect the brain? as of last year, how many obese adults in the us were also once obese children?

The research question that would be most appropriate for a four to five page research paper is B Should the government impose restrictions on what kinds of foods can be served in school cafeterias? This is a good topic for a research because you can find a lot of sources to implement in your own research, as well as incorporate your own opinions on the topic, which can be quite controversial. The other options are fact-based, and can be answered in a couple of sentences, they don't need a lot of pages.