The California Department of State Police keeps track of the number of points received for various traffic violations by drivers. The department is interested in examining the relationship between the number of points received and the insurance premium. Some information on the point category and the insurance premium category is given below: Point category
Insurance premium category Low Medium High
Cheap 12% 38% 50%
Medium 29% 33% 27%
Expensive 29% 23% 27%

Which distribution is displayed in the above table?
a. The joint distribution of premium category and point category.
b. The marginal distribution of point category
c. The conditional distribution of premium category given point category
d. The conditional distribution of point category given premium category