Final answer:
The question asks about the past occupation or role of a character named Jack in England. The provided excerpts mention several occupations but do not directly relate to the specific options given for Jack's background. Without additional context, it is not possible to ascertain Jack's past.
Step-by-step explanation:
The question seems to be related to a literary character's background or occupation prior to a certain point in the story. From the provided information, none of the characters or scenes directly indicates that Jack was a butcher's apprentice, a policeman's son, a rugby team captain, a head choirboy, or a star student. The information does not sufficiently relate to any of the specific options given for Jack's background in England, making it impossible to determine the correct answer without additional context or clarification.