Final Answer:
In the book "Resistance," after being a courier for some time, Chaya's next mission was _(a) to sabotage a German ammunition train._ Thus the correct option is A.
Step-by-step explanation:
Chaya's transition to the mission of sabotaging a German ammunition train, as denoted by option (a), marks a critical point in the plot. This choice aligns with the narrative of many resistance-themed stories set during World War II, where characters engage in covert operations to impede the enemy's military efforts. Sabotaging a German ammunition train is a strategic and daring mission, showcasing the protagonist's commitment to disrupting the war machine and contributing to the resistance movement.
Option (b), "To infiltrate the Gestapo headquarters," may represent a different storyline within the book, but the question specifically inquires about Chaya's subsequent mission after her courier role. Option (c), "To assassinate a high-ranking Nazi official," and option (d), "To rescue a group of Jewish prisoners," are plausible missions in a resistance narrative, but the question directs attention to Chaya's immediate next assignment, which involves sabotaging a German ammunition train. This response aligns with the logical progression of missions in many war-themed novels, where characters move from less perilous roles to more high-stakes and impactful operations.
The mission to sabotage a German ammunition train carries inherent tension, danger, and strategic significance, making it a pivotal moment in Chaya's journey as a resistance member. This choice not only serves the plot's development but also underscores the protagonist's evolution from a courier to a more active and impactful role in the resistance against the occupying forces.