You have a recording electrode in the cortex of a monkey, and you are listening to cells fire as the monkey makes different kinds of movements. You note that the cell you are listening to increases the rate of firing a full second before the monkey moves a joystick with either his left or right hand. Based on this information, you predict that the neuron you are listening to is located in the: A. Supplementary motor area B. Primary motor cortex C. Posterior parietal cortex D. Premotor area