Final answer:
Sandy exhibits a Planning cognitive style through her methodical approach to vacation planning and taking initiative to organize team agendas, which aligns with cognitive psychology's study of human thinking.
The correct option is C.
Step-by-step explanation:
Sandy's behavior of planning her vacations 12 months in advance and volunteering to create agendas for team meetings exhibits a Planning cognitive style. Cognitive styles refer to the preferred way an individual processes information.
A Planning cognitive style is characterized by a methodical approach to tasks and situations, often involving detailed preparation and organization, much like Sandy's behavior. This can be contrasted with Allen, who scrambles to finish his projects, suggesting a more reactive or less organized cognitive style compared to Amy who planned ahead and exemplifies a Planning cognitive style as well.
When looking at the field of cognitive psychology, which is the branch that focuses on the study of human thinking, we can see that Sandy's approach fits well within the Planning cognitive style, as it involves thoughtful organization and foresight.
The correct option is C.