One Difficulty in Interpreting the Correlation Between Asymmetry in the Planum

One difficulty in interpreting the correlation between asymmetry in the planum temporale and language function that has recently arisen is that

A) the extent of the anatomical differences between the left and right hemispheres may have been overestimated by the techniques used to identify this region.
B) it has been found that the planum temporale is an area of great plasticity that changes in size throughout development.
C) newer studies indicate that the planum temporale is involved not in language function but rather in vision.
D) current studies suggest that fewer people than previously thought have left-hemisphere language dominance.