A nutrition researcher adds 30 mg of the mineral iron to the daily diet of 50 4-week-old laboratory mice. After ten weeks, the scientist takes blood samples from each mouse. According to his findings, the mice developed abnormal levels of certain enzymes in their red blood cells. Based on this information and your knowledge of scientific research, what would you tell him?
A. He should call a press conference and report his findings to the public, so they can avoid consuming excess iron.
B. He should consider his findings as an observation and redesign the study to include a control group.
C. He should report his findings to other nutrition scientists, so they can repeat his study and confirm the results.
D. He should prepare a research article that describes his study and its results for submission to a peer-reviewed nutrition journal.
Answer: B
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