Which of the following is true about data:

a$.$

Data warehouse is useful for business intelligence, batch reporting, data visualization

b$.$

Data cube is a subset of a datawarehouse and the data is highly curated for a specific community.

c$.$

Data lake refers to large amounts of raw and unstructured data only

d$.$

Data hosting is about setting rules and processes that are needed to manage data

e$.$

End users often work with data in unstructured formats