Final answer:
To be eligible for the Zone B Selective Reenlistment Bonus, a person must have a minimum of 6 years of active military service.
Step-by-step explanation:
To be eligible for the Zone B Selective Reenlistment Bonus (SRB), a person must have completed a minimum of 6 years of active military service. The SRB is designed to retain service members with critical skills or in specific career fields where retention is essential. Each zone in the SRB program correlates with specific years of service and reflects the priority of retaining experienced personnel in certain roles. While Zone A typically covers service members with 17 months to 6 years of service, Zone B is designated for those who have more than 6 years but less than 10 years of service.