The answer is "<span>Hostile/detached".
Of the two troubled couple composes, Hostile couples remained miserably wedded, while Hostile-Detached couples inevitably separated. Hostile-Detached couples resemble two armed forces occupied with a commonly disappointing and desolate standoff. They kill at each other amid struggle, despite the fact that the air is one of passionate separation and acquiescence.
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I'm pretty certain A is correct
The correct answer for this question is this one: "d. Both a and b." The triple alliance involved Germany, Austria-Hungary and Italy, while the Triple Entente contained Russia France and Britain. So the answer should include Triple Alliance and Triple Entente.