How can the structure of a computer's file system be leveraged for the design of recursive functions?

a$.$

The structure of the file system is not relevant to the design of recursive functions.

b$.$

Recursive functions can only be used for mathematical calculations, not file system operations.

c$.$

The hierarchical structure of a file system can be used to traverse directories and perform operations recursively.

d$.$

Recursive functions in the file system are used to optimize file storage and retrieval.