Final answer:
Nancy is engaging the most in working memory as she diligently studies her note cards to remember and understand the material for her psychology exam.
Step-by-step explanation:
Nancy is engaging the most in working memory as she diligently studies her note cards to remember and understand the material for her psychology exam. Working memory is a cognitive system that temporarily holds and manipulates information while actively performing complex tasks. It involves active attention, rehearsal, and integration of new information with existing knowledge.