I think the answer would be C. an angry state of mind
The points A, B, and D are different definitions from those of "a feeling or state of mind." That being said, they would not be alternate defintions. Also, "an upset or angry state of mind," comes with the primary definition, meaning C. would be an alternate definition.
I would go with barb, think of a barbed wire fence and then think of the tip of the arrow. It makes the best match.
In chapter 7 Ender begins to feel homesick because he is worried about having friends that are girls will ruin his street cred. He also misses his parents and friends.
No no, I'm not joking that is the result I got from googling it and from reading it myself a year back.
I say
C.<span>refuge, inhabited, dog, mule</span>