Answer:
A is the answer.
Explanation:
In Latin, the phrase means "in the midst of things", so it is in the middle of something, usually a story.
It's the practice of beginning an epic or other narrative by plunging into a crucial situation that is part of a related chain of events; the situation is an extension of previous events and will be developed in later action.
Tanner uses his computer to highlight the word in Bold faced type.
Like many other Frenchmen, Maupassant felt very bitter about France's defeat in the Franco-Prussian War, which lasted from July of 1870 to May of 1871.
Hope I helped! ;)