Correct Answer: C
Explanation:
Choice A is guilty of two Pronoun errors. Both pronouns "it" and “itself” should refer back to “NATO”, but because “NATO's” is used as an adjective (preceding “relationship”, which is the noun), neither pronoun is used correctly. Furthermore, the pronoun “it” is unclear in its reference, as it could also modify “Russia”. Because of these errors, answer choice A is incorrect.
Answer choice D is also guilty of a Pronoun error, as it uses the plural pronouns “they” and “themselves” to modify the singular “NATO”. Accordingly, answer choice D is incorrect.
Answer choice E commits a Tense error, as the modifier “soon” implies a future event, and is therefore inconsistent with the verb “have found”, which indicates the recent past. Consequently, answer choice E is incorrect.
Answer choices B and C are similar, but B is incorrect because of an illogical meaning/diction error. NATO has a “relationship with” Russia, and not a “relationship toward” Russia. In situations like this, you may want to test the idiom with your own situation to see which idiom clicks. “I have decided to end my relationship with my ex-girlfriend” is the way you would phrase that situation; “I have decided to end my relationship toward her” should sound awkward in comparison.
Therefore, answer choice B is incorrect, and answer choice C is the correct answer.