What is a sanction?

a. An unofficial penalty given to Country A, for not abiding by an international law imposed by Country B.
b. An official warning given to Country A, for not abiding by international standards imposed by Country B.
c. An official penalty given to Country A for not following an international rule of law imposed by Country B. Correct
d. None of the above

Option C

Explanation:

A sanction is a threatened penalty a country A gives to a country B for not following or obeying an international rule, it is always official and imposed by such country A, meanwhile, it is not only a country that can give another country , a commission, a Union can sanction country, so far it is part of the union. So the best options that defines what a sanction is ,is option C , as it an official penalty given to a country for not following a rule or law according to international standards bonded by the law.