Read the research question about recycling.
is recycling effective in the united states?
why isn’t this research question effective? check all that apply.
it is not about a researchable topic.
it has a single answer.
it is too broad.
it may prompt further research.
it lacks complexity.
it is not specific enough.

the correct answers are C, E, F.  

It may prompt further research

It is not specific enough

A research must have a well-defined object. In this way, the researcher needs to choose something specific. In that case, the question "Is recycling effective in the United States?" is very broad. What kind of recycling is being talked about? Of glass? of pastic? of rubber? of trash? Anyway, a survey on recycling is perfectly possible, but needs to be better specified.

For example: it is possible to analyze a city that recycles its garbage has satisfactory results that make the difference for the environment.

the answer is "the man who came here yesterday was selling magazines."