Question: Why do firms need to create separate data repositories ( i . e . data warehouses, data marts ) for their reporting and analytics work?

Why do firms need to create separate data repositories (i.e. data warehouses, data marts) for their reporting and analytics work?
Question 9 options:
Most firms store their data assets exclusively offsite to protect it against natural disasters.
Maintaining huge databases can be cost-ineffective for most firms.
Most organizations need to differentiate data derived in-house and from data aggregators.
Running analytics against operational databases can slow down essential business processes in the company.

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