The answer is C. if the underlined word is "get"
In your story, you can write about a boy having to write an essay on a horse, and then being betrayed by a friend who took credit for the essay. Use the word antique desk as a way of incorporating imagery into your story. Use the word horse as the topic the boy used for his story or essay and use the word betrayal as how the boy felt after realizing what his friend has done. This is what I would personally do, hope it helped!
I'd say d is the answer. By chemical attack, it is specifically a gas attack. Gas masks, all buy one is able to put on their gas masks. Presumably that one guy died. B is definitely incorrect.
I believe the answer is "Because he got new pants"