How to store the history of the poll?

Develop a survey system (magento 2).
Planned for the time table:
surveys;
- questions for the surveys;
- answers;
answers users.

You also need to provide for the amendment of questions to the survey after you already have the answers. Namely, I would like to keep history for answers to already existing questions (for displaying in the admin).

Any idea of the history table where there are answers (and questions) in the text without reference to the questions. I.e. there is a duplication in the event of any changes in the issues.
Of the minuses: after any change will need to take all answers of users and record again. Is too bloated.
p.s. Came up with the idea to keep the answers only for questions that were changed or removed, i.e. like in git.

Here's another idea: if there is a need to change anything in the poll, you need to create a new one. Not to worry with getting the same questions, table questions unbinds from surveys and serves only as a dictionary from which to get a question in a new poll.
Of the minuses: even with a dictionary it is not that easy to change in 1 case.
Pros: easy to store, don't even need the extra table.

How to do it properly?
July 2nd 19 at 13:20
2 answers
July 2nd 19 at 13:22
Solution
That's right - nothing to remove, but only to mark that the question is not necessary to show.
Also thought about it, but there is still a change in the answers to the questions.
Now I will add another idea into question, tell me what you think about her, please. - meggie commented on July 2nd 19 at 13:25
July 2nd 19 at 13:24
Solution
Using the flags of the States.

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