What is the difference between Cp and Cpk$,$ two calculations used to assess process capability?

A Cp focuses on centering and ignores process spread, while Cpk accounts for process spread only.

B Cp and Cpk are different names for the same calculation, representing overall process capability.

C Cp and Cpk assess process variability, but Cp focuses on the upper specification limit$,$ while Cpk focuses on the lower specification limit$.$

D Cp is calculated based on the average of the process mean and standard deviation, while Cpk uses the median and range for its calculation.

E Cp measures process capability regardless of whether the process is centered, while Cpk considers both process spread and centering.