People Made a Spontaneous Decision of When to Flex a Wrist,and

Multiple Choice

People made a spontaneous decision of when to flex a wrist,and later reported the time of that decision.What was the key result?

A) The reported decision took place a few milliseconds before the brain activity began.
B) The reported decision took place at the same time when the brain activity began.
C) Brain activity preparing for the movement started before the reported decision.
D) Most people reported the time of the decision at the same time the movement started.