Answer:
4. Maintain; Defaults, Inventory Items, record inventory information.
Explanation:
The question, in my understanding, is referring to master data of inventory items. Most enterprise inventory systems maintain attributes/information about a specific inventory item in a master table so that this record (and all other default info saved against it) can be pulled up and used in transactions as needed. Answers 1-3 are all pertaining to transactions and not maintenance information.