What is the most obvious problem during the beginning stages of dementia?

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Anterograde amnesia, or difficulty forming new memories, is one of the most obvious symptoms of early stage dementia. Other symptoms may include forgetfulness, confusion, difficulty with language, and changes in mood or behavior. Choreoathetosis (A) is a movement disorder that may occur in later stages of some types of dementia, but is not a noticeable problem in the early stages. Delirium (B) is a separate medical condition characterized by acute confusion and disorientation, rather than the gradual cognitive decline of dementia. Retrograde amnesia (C) involves difficulty recalling past memories, but is not as common or noticeable in early stage dementia as anterograde amnesia.

What Is the Most Obvious Problem During the Beginning Stages