Across Two Studies Investigating the Heritability of Factors Such as Ego-Strength

Across two studies investigating the heritability of factors such as ego-strength, super-ego strength and self-sentiment, Cattell and his colleagues found

A) estimates across the two studies were later judged by Cattell to be incorrect
B) results of one study were not entirely in line with those of the other study
C) heritability was equal and high for all the factors across the studies
D) heritability was equal and low for all the factors across the studies