Question: Generics are useful when you **\_**.
- need to reduce code duplication by concretizing values and restricting parameters in functions
- need to reduce code duplication by abstracting values further, such as in function parameters
- need a supertrait
- are not sure if you need a specific kind of trait
Answer: The correct answer of the above question is Option B:need to reduce code duplication by abstracting values further, such as in function parameters