If someone has damage to the supplementary motor area on one side, what will be the resulting effect on a behavior such as opening a jar?
A. Both hands will operate out of synch with each other.
B. Both hands will mirror each other's actions instead of doing separate holding and twisting movements to open the jar.
C. One hand will not participate in the task at all.
D. The jar will be opened, but the hands will constantly shake during the task.
Answer: B
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