Fill in the blanks to complete the sentence:

No country should interfere ______the internal affairs ______another country,

Option C, "in; of" is the correct answer. The sentence should read, "No country should interfere in the internal affairs of another country." This means that no country should get involved in another country's domestic policies or decisions.

The preposition "in" refers to involvement within something. In this case, it refers to the internal affairs of another country. The preposition "of" refers to belonging to or relating to something. In this case, the internal affairs of another country belong to that country and are specific to that country's situation.

Option A, "with; in" is incorrect because "with" does not fit the context of the sentence. "Interfere with" means to disrupt or prevent the normal operation of something, but the sentence discusses involvement in something, not disruption.

Option B, "with; for" is incorrect because "for" does not fit the context of the sentence. The sentence is not discussing a purpose or objective but rather an action that should not be taken.

Option D, "in; in" is also incorrect. The preposition "in" is incorrect. In this case, the internal affairs of another country belong to that country and are specific to that country's situation. The correct preposition should be "for" in the second blank.

The answer is option C.