Answer: Planning cognitive style
Explanation: Cognitive style or thinking is way of describing human thinking and the reason behind the actions an individual makes in a certain situation.
Planning refers to that function of management that deals with setting of goals and objectives.
In the above case, Sandy is demonstrating planning aspect of cognitive thinking. She is setting her goals and objectives on a predetermined basis, on both personal and professional grounds. Thus, she has a way of thinking that she can do planning effectively.