答案：C

解析：

Choice C is the best answer. Prabhakaran, Green, and Gray found a correlation between the semantic distance of noun-verb pairs provided by a participant and the participant's creativity. The researchers also found a connection between creativity and the strength of certain other traits, and they concluded that creative thinking involves deliberately accessing remote information. Someone with a steep associative hierarchy as described by Mednick would probably provide noun-verb pairs with little semantic distance and would be characterized as a less creative thinker; Prabhakaran, Green, and Gray's conclusion suggests that such a person would be more likely to struggle to recall and access information than would someone with a flat associative hierarchy.