All of the Following Were Presented as a Critique of Kohlberg's

All of the following were presented as a critique of Kohlberg's theory EXCEPT:

A) it is not clear how each stage logically forms the basis for the next one
B) the theory may be gender biased as Kohlberg based his model on data collected from middle-class boys
C) young children may have had difficulty with Kohlberg's tasks asking them to consider rules typical of most games
D) researchers have found that different cultures show different proportions of the population having reached higher moral levels