The authors mentioned the interesting correlation between natural red hair and lower pain thresholds compared to persons with other natural hair colours.This is most likely to be due to the fact that
A)natural pain thresholds cause people to be born with different natural colours of hair.
B)genetic factors that impact pain threshold are also somehow related to hair colour.
C)natural hair colour causes people to have an increased or decreased pain threshold.
D)persons with red hair demonstrate a specific sensitivity to pain in their free nerve endings.

Question

Quizplus · Accepted Answer

It is most likely that genetic factors impacting pain threshold are also related to hair colour, as the correlation between red hair and lower pain thresholds suggests. It is unlikely that natural pain thresholds cause people to have a certain hair colour, and it is not clear that natural hair colour would directly impact pain threshold. The statement about free nerve endings is not supported by the text.

The Authors Mentioned the Interesting Correlation Between Natural Red Hair