Nicholas Has Been Diagnosed with Parkinson's Disease,which Causes Deterioration of the Basal

Nicholas has been diagnosed with Parkinson's disease,which causes deterioration of the basal ganglia.We can expect that Nicholas will 

A) have difficulty moving, but his emotional expression will be normal. 
B) show no emotional expression at all. 
C) be able to smile spontaneously when he hears a good joke, but will not be able to smile when the photographer asks him to do so. 
D) be able to smile voluntarily for a photograph, but will not smile spontaneously when he hears a good joke.

Correct Answer:

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