Which of the following was NOT the case in Bower et al.’s (1969) research into the role of organized hierarchical information in memory?

A. Presenting the words in meaningful hierarchies reduced the learning time to a quarter of that required for the same words randomly positioned.
B. The organization of the hierarchy emphasized aspects of the words meanings.
C. The hierarchy identified three different levels of information processing.
D. The organization of the hierarchy simplified the learning of the lists.