Answer:
Based on the details of this passage, what we can you infer about the soldier is:
1. He is suspicious of Will.
Explanation:
The question instructs us to take the passage into consideration. Without any more context than the one given in the excerpt, we may safely infer the soldier is suspicious of Will.
There are no details in the passage that could lead us onto thinking the the soldier wants Will to join the Army, or that he is trying to play a joke on Will, much less that he knows Will's aunt. On the other hand, there are details that indicate suspicion, such as the way the soldier watches Will and the questions he asks him:
Another soldier was watching Will closely. This man had not laughed so much as his companions. "What are you doing out so early, boy?" he demanded.
Will gave a start. He hoped the man did not notice it. He did some fast thinking. "I'm on the way to my aunt's house, sir."
"Where does she live?" asked the soldier. He kept his eyes fixed on Will.
We can infer someone who keeps watching us closely and asking us questions is suspicious of us. Maybe that person thinks we are lying about something; maybe they simply find our behavior to be odd. Therefore, from the details in the passage, we can choose number 1 as the best option: He is suspicious of Will.