What was the main occupation of the characters described in the text?

The correct answer highlights that the primary occupation of the characters in the text is military personnel. Roald Dahl's memoir "Going Solo" recounts his experiences during World War II, particularly his time serving in the Royal Air Force. Throughout the narrative, he details the challenges and adventures he faced as a pilot, providing insights into life in the military during this historical period. The focus on military experiences, training, and the details surrounding aerial combat clearly establish that the characters are primarily engaged in military-related roles.

This context eliminates the other options, as there are no significant themes or narratives centered around farming, medicine, or journalism in the passages describing the characters' lives. Instead, the emphasis is firmly on the experiences and lessons learned in a military setting.