Mary Ann: Our country should, above all, be strong.
Conclusion (should)
We should judge a country by the morality of its actions, not by its strength.
Evidence
Strength has often been used for atrocities (immoral actions).
If a country's actions are morally good, the country is admirable.
Evaluate
If we accept Inez's premise that , then it sounds like judging by morality is A way to judge a country.
If we were trying to fight her conclusion, maybe we could say,
This rule also doesn't give us a way to conclude we shouldn't admire a country, so we could complain that this is only a way to judge that we should admire a country, and maybe we need some other metric to judge whether we shouldn't.
Goal
Look for anything being assumed by her method of judging countries, or look for an answer ruling out a potential alternate way to judge countries.