Which of the Following Is TRUE About Managing Defective Blocks

Which of the following is TRUE about managing defective blocks?

A) Defective blocks can be handled by OS by ensuring that the file system doesn't allocate those blocks.
B) Low level formatting can set aside spare sectors not visible to the operating system.
C) Controllers can be instructed to replace a bad block by moving all sectors following the defective sector one sector forward until a spare sector is reached.
D) All of the above.

Correct Answer:

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