Concept:This is a third conditional sentence expressing an unreal past situation.Explanation:The phrase “Had it been possible…” means “If it had been possible…”The clause “I would have done so” refers to leaving the country.Since the condition was not fulfilled, the action did not happen.The speaker wanted to leave but could not because it was not possible.Thus, the correct interpretation matches option D.Answer:D. I would have liked to leave the country but I wasn't able to.