Choose the word or set of words that, when inserted in the sentence, best fits the meaning of the sentence as a whole.
Although the acreage involved in a national boundary dispute may seem insignificant, even the slightest ------- in a country’s alleged border appears ------- to that nation, a threat to its security.
Answer Choices (A) inconsistency . . felicitous (B) variation . . trivial (C) rigidity . . traumatic (D) change . . favorable (E) breach . . ominous