Question: Given this code, which statement about the database table "documents" could be expected to be _true_?

1. It would include a column for `:type`.
2. It would include columns for `:documentable_id` and `:documentable_type`.
3. It would include columns for `:documentable` and `:type`.
4. It would include a column for `:polymorphic_type`.

Answer: The correct answer of the above question is Option B:It would include columns for `:documentable_id` and `:documentable_type`.