Final answer:
The testing procedures for Advanced Individual Training (AIT) and MOS portion of OSUT will have at least two versions and all versions are used concurrently to assess the knowledge and skills of trainees.
Step-by-step explanation:
The correct answer to this question is B) Will have at least two versions. Use all versions concurrently.
The Advanced Individual Training (AIT) and MOS portion of OSUT (One Station Unit Training) typically involve multiple versions of testing procedures.
Having multiple versions helps ensure fairness and reduce the possibility of cheating. All versions are used concurrently to assess the knowledge and skills of trainees.