The correct answer is A) Economic, Environmental, or External obsolescence.
The types of depreciation that apply are Economic, Environmental, or External obsolescence.
Mrs. Jenkins' neighborhood is definitely in decline because is depreciating due to economic, environmental, or external obsolescence.
Although she has a beautiful cottage, well preserved, the neighborhood is in bad conditions for the situation statted above. Her property is depreciating because the surroundings are not favoring her property. It would be very difficult for a real state agent to upgrade the value of her property because the neighborhood doesn't seem attractive to other people.