Suzie's Parents Suffered from Alzheimer Disease Before They Died

Suzie's parents suffered from Alzheimer disease before they died.Although Suzie is still in her early forties,she is concerned about her own cognitive functioning.Her niece,Diana,is a medical student.What helpful advice is Diana most likely to give Suzie based on her knowledge of Alzheimer disease?

A) Suzie should avoid all physical activity.
B) Suzie should start taking medication in order to prevent the onset of the disease.
C) Suzie should stop engaging in activities that cause intellectual stimulation.
D) Suzie should engage in challenging cognitive tasks as frequently as possible.