Many Ann: Our country should, above all, be strong. Strength gains the respect of other countries and makes a country admirable.
Inez: There are many examples in history of countries that were strong but used their strength to commit atrocities. We should judge a country by the morality of its actions, not by its strength. If the actions are morally good, the country is admirable.

Which one of the following is a presupposition that underlies Inez' argument?

(A) At least one country is admirable.
(B) Countries can not be both strong and moral.
(C) It is possible to assign moral weight to the actions of countries.
(D) The citizens of any country believe that whatever their country does is good.
(E) Countries should impose their standards of morality on other countries by whatever means necessary.

I am convinced about the answer but can someone explain why B should be ruled out?
OA: C