Final answer:
A Marine may be excluded from meritorious board recommendations due to disciplinary issues, lack of physical fitness, or substandard job performance.
Step-by-step explanation:
Factors that prevent a marine from being recommended for a meritorious board include disciplinary issues, failure to meet physical fitness standards, or deficiencies in job performance.
Meritorious boards are convened to recognize exemplary service, and thus, any conduct that falls short of the Marine Corps' high standards could disqualify an individual. This can range from a recent non-judicial punishment (NJP) to consistently poor performance evaluations or failure to uphold core values of honor, courage, and commitment.