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:

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