The answer is 'by not fulfilling expectations'. The other options don't really surprise the reader, and if the plot is going into one direction, and then what you'd expect to happen doesn't actually happen, you are surprised, and the element of irony is achieved.
Answer:
<em>Where</em><em> </em><em>was</em><em> </em><em>football</em><em> </em><em>played</em><em> </em><em>by</em><em> </em><em>them</em><em>?</em>
Answer:
Little-known facts about the topic.
Explanation:
B. One of your troop members began to cry.
It doesn't explain why he is crying, and is the most suspenseful, but one could argue it was C, because they could have going the wrong direction, but B is the most suspenseful due to the crying and emotion in it.
Hope this helps, even though I just debated aloud.
