$7)$ Which statement best describes Pareto Charts?

a$)$ Create a framework to which a surface level problem can be linked to its root

problem

b$)$ Show data as a function relative to their probability of occurrence

c$)$ Plots data in such a way as to make regression analysis possible

d$)$ Help to focus attention on the variables that have the greatest impact on

customer dissatisfaction

e$)$ None of the above