The excerpt from "The Veldt" that best supports the answer to Part A is Long before you knew what death was you were wishing it on someone else. When you were two years old you were shooting people with cap pistols. Here option C is correct.
This detail supports the idea that the children in the story, Wendy and Peter, have developed a disturbing fascination with violence and death through their interactions with the virtual reality nursery, particularly the veldt simulation.
The mention of the children playing with cap pistols and expressing early thoughts about death highlights the impact of technology on their psychological development, providing evidence for the detrimental effects of the futuristic nursery on their behavior.
This detail is relevant to understanding the shift in the children's attitudes and behaviors, emphasizing the negative consequences of the virtual reality environment on their mental and emotional well-being. Here option C is correct.