Determine whether the given source has the potential to create a bias in a statistical study. A data set includes brain

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Determine whether the given source has the potential to create a
bias in a statistical study.
A data set includes brain volumes from 10 pairs of monozygotic​
(identical) twins. The data were collected by researchers at
Harvard​ University, Massachusetts General​ Hospital, Dartmouth​
College, and the University of California at Davis.
Choose the correct answer below.
A.There does appear to be a potential to create a bias. There is
an incentive to make the results statistically insignificant.
B.There does appear to be a potential to create a bias. There is
an incentive to produce data showing identical brain volumes.
C.There does not appear to be a potential to create a bias. The
organizations collecting the data are reputable.
D.There does not appear to be a potential to create a bias. The
organizations would not gain from putting spin on the data.