Final answer:
Memory problems due to amnesia primarily include experiences like loss of memory for events just prior to a brain trauma (retrograde amnesia), and inability to recognize familiar faces or recall one's name (anterograde amnesia). Ordinary forgetting, such as misplacing items, does not usually signify amnesia.
Step-by-step explanation:
The examples indicating memory problems as a result of amnesia are primarily A - Loss of memory for events just prior to a brain trauma which is a case of retrograde amnesia, C - Being unable to recognize familiar faces, and D - Not remembering your own name. The other options do not necessarily signify problems of amnesia. Anterograde Amnesia, represented by C and D, refers to the inability to form new memories or recognize familiar settings or people after a brain trauma. Retrograde Amnesia, represented by A, refers to forgetting events that occurred just before a trauma.
Forgetting where one left one's keys, as in example B, is generally considered normal forgetfulness unless it's severe or recurrent in nature. These types of amnesia are typically caused by brain trauma or extremely stressful occurrences, and are not caused by ordinary forgetting.
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