Final answer:
The correct action for requesting credit for unsellable items is to Return to vendor, which allows for financial recovery through a refund or credit note from the supplier.
Step-by-step explanation:
To request credit for items that are no longer sellable, the correct action would be b) Return to vendor. This process usually involves contacting the supplier or manufacturer of the products and arranging for the items to be sent back. In return, the business would often receive a refund or credit note from the vendor, which can then be used against future purchases or to adjust the accounts. Options such as disposing of the items or donating them would not allow the business to recover any of the costs associated with the unsellable items. Zero-on-hand indicates inventory reduction without financial recovery.