I'd say it's between B. or D. since A and C look like what the green light represents.
What i'm really confused. Is this just for points?
Answer:
The Crucible begins in the house of Reverend Samuel Parris, whose daughter, Betty, lies unconscious in bed upstairs. Abigail denies that she and the other girls were participating in witchcraft, but Parris suspects she is lying. ... He thinks that she and Betty have conjured spells.
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.