What can be said about Christopher's goal to run a marathon next month?

Christopher's goal to run a marathon next month is personal and time-bound because it focuses on his personal ambition to complete a marathon, highlighting his commitment to physical fitness and endurance. The mention of a specific time frame—next month—indicates a deadline that adds urgency to the goal, helping him stay motivated and focused on his training. Personal goals, such as running a marathon, often involve individual aspirations for self-improvement or achievement, which distinguishes them from professional goals that relate more directly to one's career or job performance.

In contrast, the other options suggest characteristics that do not apply to this scenario, such as an unachievable nature—since many individuals successfully complete marathons with proper training—or being irrelevant to his career. This underscores why the correct characterization of the goal is tied directly to its personal significance and the defined time frame for its completion.