Question: What would happen if you attempted to compile and run this Go program?

1. It would not compile because `GlobalFlag` was never initialized.
2. It would compile and print `[]`.
3. It would compile and print nothing because `"[" +nil+"]"` is also `nil`.
4. It would compile but then panic because `GlobalFlag` was never initialized.

Answer: The correct answer of the above question is Option B:It would compile and print `[]`.