What is the primary reason an organization using IBM Cloud would use software-defined storage?

What is the primary reason an organization using IBM Cloud would use software-defined storage?
A . Being extremely fast, it is ideal for custom cloud native database services.
B . It allows developers to trial disk layouts and IOPS configs where applications have demanding storage requirements.
C . It has the ability to store application data across different availability zones, increasing resilience.
D . It is the lowest cost of storage available, so it reduces total cost of ownership.

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Answer: C