A researcher is studying the amygdala (a part of the brain involved in emotion). Six participants in a particular fMRI (brain scan) study are measured for the increase in activation of their amygdala while they are viewing pictures of violent scenes. The activation increases are 0.39, 0.26, 0.48, 0.28, 0.46, and 0.42. , Complete parts (a) through (c) below. (a) Find the mean. M =(Round to three decimal places as needed.) (b) Find the standard deviation. SD = (Round to three decimal places as needed.) (c) Explain what the results mean to a person who has never had a course in statistics. A. The mean is the total amount of increase in activation for all the participants in the study. The standard deviation is the total amount that the amount of increase in activation differs from the mean value. O B. The mean is the average or center value in the distribution of the amount of increase in activation of their amygdala. The standard deviation is the average amount that the amount of increase in activation differs from the mean value. O C. The mean is the average or center value in the distribution of the amount of increase in activation of their amygdala. The standard deviation is the total amount that the amount of increase in activation of their amygdala differs from the mean value. O D. The mean is the total amount of increase in activation for all the participants in the study. The standard deviation is the average amount the amount of increase in activation differs from the mean value