Option B is correct because a first migration workload should be low risk, relatively independent, and useful for building team experience before moving business-critical systems. An internal marketing portal is a better candidate than claims processing, trading, or compliance workloads because failure has lower operational impact. Rehosting with AWS Application Migration Service supports a fast lift-and-shift migration, which is appropriate when an on-premises contract expires in less than 6 months. Adding AWS Systems Manager Patch Manager also establishes operational discipline after migration. Option A introduces unnecessary re-architecture too early. Option C selects a latency-sensitive trading workload, which is too risky as a first migration. Option D adds database conversion complexity and compliance risk, which slows the migration and increases the chance of failure.