Concept: The modal expression "couldn't have said" shows that the speaker is certain the action did not happen.Explanation: "Couldn't have said that" is used when we strongly deny that something happened in the past.It does not simply mean that it is unlikely; it means the speaker believes it was impossible.Therefore, Jide did not make the statement at all.Option D, "Jide didn't say it," captures this meaning best.Answer: D. Jide didn't say it.