CRIPS$-$DM$,$ KDD and SEMMA are all data analytics methodologies. Which of the following is common to all of these methods?

Select one:

a$.$

They are all about structured data.

b$.$

They address both structured and unstructured data.

c$.$

These are distinct methodologies and there is no commonality amongst them.

d$.$

These are older methodologies that are not deployed any longer.