Consider a library that needs to add unique identifiers to objects without risk of property clashes. How would Symbols be utilized in this case?

The correct option is using Symbols as unique identifiers. Symbols provide a way to create unique keys for object properties, ensuring that the identifiers added by the library are distinct and not prone to clashes. Using string identifiers or numbers may lead to conflicts, especially in a shared library context. Object literals with unique keys can be used, but Symbols offer a more direct and elegant solution.