Answer :
The question is most effective for guiding William's research is why do the USDA’s current recommendations regarding the consumption of dairy products contradict current research finding.
What is research question?
Research question are asked to help guide research, this are question to answer when doing research and the results of the research help answer the question.
Therefore,
The question is most effective for guiding William's research is why do the USDA’s current recommendations regarding the consumption of dairy products contradict current research finding.
Learn more on research below
https://brainly.com/question/968894
#SPJ1