The aspects that can make your code reusable are:
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Adding functions: Functions encapsulate code into reusable modules, allowing you to call them multiple times without rewriting code.
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Adding required functionalities: If your code has the necessary functionality that can be applied in various contexts, it increases its reusability.
While adding comments and print statements can enhance code readability and debugging, they do not directly contribute to the reusability of the code itself.
So the best choices for making code reusable from the options provided are "adding functions" and "adding required functionalities."