Mary ann experiences a mugging and robbery in which her prized poodle is kidnapped. eventually the dog is found and returned. however, she is unable to recall events immediately following the attack, up until the safe return of the dog. this is a classic example of

Localized amnesia

Explanation:

Localized amnesia result to not being able to remember particular events for a particular span of time. The periods in which one is unable to recall things is induced by stressful events or traumatic events such as forgetting those times in which one was abused or the ones they spent in exile. The reason is because we want to never bring back that terrible memory due to the emotions we went through during those times when these events took place.

a is the answer because it just is