Final answer:
The best example of a person with an impairment of orientation is a person who has difficulty understanding time and dates, as orientation includes awareness of temporal circumstances.
Step-by-step explanation:
A good example of a person with an impairment of orientation is Option 2) A person who has difficulty understanding time and dates. Orientation refers to the patient's awareness of their circumstances, including the awareness of time in terms of the date and events occurring around them, the awareness of place, and the recognition of personal identity. While all listed options can be associated with cognitive or memory impairments, difficulty with recognizing time and dates aligns directly with an impairment of temporal orientation.
Moreover, prosopagnosia, mentioned in the provided text, mainly deals with the inability to recognize faces, which is a sensory perception issue but not necessarily an impairment related to orientation. Memory tests such as recalling three words or reversing the sequence of months are used to assess memory, but they do not directly indicate an impairment of orientation.