Which panel in the figure shows an example of the movement termed protraction? 
Definitions:
Progressive Memory Deficit
A gradual decline in memory function, which can be a symptom of various neurological conditions, including Alzheimer's disease.
Dementia
A chronic or persistent disorder of the mental processes caused by brain disease or injury and marked by memory disorders, personality changes, and impaired reasoning.
Environmental
Relating to the natural world and the impact of human activity on its condition.
Apolipoprotein E
A protein involved in the metabolism of fats in the body, important in the development of Alzheimer's disease and cardiovascular disease.
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