Final answer:
The Deployment Reassignment Authority manages the UTC Reclama process for reassigning taskings between MAJCOMs, dealing with shortfalls and ensuring appropriate resource allocation.
Step-by-step explanation:
The individual responsible for overseeing and managing the Unit Type Code (UTC) shortfall/Reclama process when tasking must be reassigned between Major Commands (MAJCOM) is d) Deployment Reassignment Authority. This position has the authority to address any shortfalls in personnel or resources and can initiate a Reclama to request adjustments or replacements for deployment taskings. The process involves coordination between different commands to ensure that the right resources are allocated to meet operational requirements.