Which of the Following Statements Is True

Which of the following statements is true?

A) Scientific studies to investigate the same question can have different findings.
B) Dietary recommendations are generally based on the findings of one team of nutrition researchers.
C) Since 1970,nutrition information has undergone few updates,because scientists have discovered all of the nutrients and determined their functions.
D) When interpreting results of their studies,researchers generally seek to include some bias into their analyses.