Galton Justified His Neurophysiological Approach to Intelligence Testing with All

Galton justified his neurophysiological approach to intelligence testing with all of the following arguments EXCEPT that

A) mentally subnormal people supposedly cannot distinguish well between hot and cold.
B) women are supposedly both less intelligent than men and less able to select a fine wine.
C) large head sizes must reflect large and powerful brains within.
D) people with quick reaction times also have large vocabularies.