Sixty-Eight-Year Old Claretta Is Often Confused About Where She Is

Sixty-eight-year old Claretta is often confused about where she is and what time of the day it is. Her adult children have noticed that other mental abilities have also been deteriorating lately. They report that Claretta does not seem to remember important information and her personality has changed. Which of the following BEST describes Claretta's condition?

A) encoding failure
B) dementia
C) repression
D) the disinhibitory effect