Research Correlates Neurological Differences with Differences in Temperament

Research correlates neurological differences with differences in temperament. What is a basic argument against the conclusions drawn from this data?

A) The relationship between brain structure and shyness is illusory.
B) Environmental influences can alter brain structure just as brain structure can alter behavior.
C) Since it is correlational data, no conclusions can be drawn.
D) environmental influences have a greater influence on behavior than do differences in brain structure.