Final answer:
DA Form 1687 is used by military unit commanders to delegate authority to certain personnel to receive orders for supplies or equipment, ensuring efficient logistics operations. Option B is correct.
Step-by-step explanation:
DA Form 1687, often referred to as the Notice of Delegation of Authority - Receipt for Supplies, is a form used by unit commanders in the military. This form is used to delegate authority to specific personnel, empowering them to receive orders for supplies or equipment on behalf of the unit.
It is not used to authorize personnel to deploy, carry firearms, or issue ammunition. The form allows for the smooth and efficient operation of military logistics by ensuring that authorized individuals can execute tasks such as receiving and distributing supplies.