Final answer:
The Explanation of Benefits (EOB) is the most helpful document for checking the status of insurance claims, as it provides detailed coverage information and amounts paid by the insurance.
Step-by-step explanation:
The options you provided are related to various financial and clerical documents, but when it comes to checking the status of insurance claims, the most helpful document is the Explanation of Benefits (EOB). The EOB is a statement from the insurance company detailing what costs it will cover for medical care or products you have received. It provides information about the benefits provided by your insurance plan, what has been paid to the provider, and any amount you are responsible for paying. A ledger could also be useful as it records all transactions including claims and payments, but it doesn't provide the same level of detail specific to insurance claims as the EOB. A bank statement would not offer insight into insurance claim status. An inventory report is more related to stock levels and asset tracking and would not be useful for this purpose.