Berko's Study Demonstrated Children's Understanding of Morphological Rules

Berko's study demonstrated children's understanding of morphological rules.Because the words in the study were fictional, it is impressive to note that the children in the study:

A) had abstracted the rules from language they had heard and applied them to novel situations.
B) remembered the rules they had been taught.
C) were unable to rely on rules with fictional words.
D) based their responses on past instances of hearing the words.