The Daughter of a 71-Year-Old Woman Brings Her to the Doctor

The daughter of a 71-year-old woman brings her to the doctor. She claims that her mother attempted to return home after going shopping yesterday but was unsuccessful. Her mother "began to forget things, like where she left her keys" and "began to have trouble remembering the appropriate phrases" two years ago. Now that she is struggling to maintain her daily routines, she says that paying her bills is a waste of money. Previous medical history of the patient is unremarkable. Which of the following structures is most likely to exhibit atrophy on brain magnetic resonance imaging (MRI) ?

A) A
B) B
C) C
D) D
E) E