Question: This code does not compile. What needs to be changed so that it does?

1. Add a constructor that accepts a `String` parameter and assigns it to the field `shortCode`.
2. Remove the `final` keyword for the field `shortCode`.
3. All enums need to be defined on a single line of code.
4. Add a setter method for the field `shortCode`.

Answer: The correct answer of the above question is Option A:Add a constructor that accepts a `String` parameter and assigns it to the field `shortCode`.