Answer: D. As a spy in Normandy, Baissac performed a variety of important and sometimes dangerous tasks in order to get in the way of German troops.
Option D is the option that includes most of the important information of the paragraph. Option A does not mention the kind of work that Baissac performed, or the purpose of this work. Option B does not mention the place where she did this work, or the fact that she was a spy. Option C includes most of this information, except for the fact that the work she performed was dangerous and against the Germans. Therefore, the most complete answer is D.
Both A and D are really close though.I'm leaning more toward D, since it mentions more about getting in the way of the German troops.
Example 1: "There, she helped to set up more resistance groups and organize sabotage actions."
<span>Example 2: "Her actions, along with those of her colleagues, often delayed the arrival of German reinforcements to the front lines of battle."</span>
The position of a topic sentence often shifts, according to the author and writing style. One should never place the topic sentence in the middle of the paragraph. It will just give your reader confusion what really the paragraph is talking about. You can place it either in the beginning or at the end of the paragraph.<span> </span>