What should be confirmed to resolve issues with iBook Store downloads?

The correct choice focuses on confirming the system requirements to address issues with iBook Store downloads. Ensuring that the device meets the necessary system requirements is crucial, as apps, including the iBook Store, often have specific operating system versions and hardware specifications required for proper functionality. If the device does not meet these requirements, it may lead to download failures or other issues.

When it comes to troubleshooting download problems, while aspects like network connection, device storage, and app availability are important, verifying the system requirements is foundational. For instance, if the device is running an outdated version of iOS or lacks the required specifications for the iBook Store, it would directly hinder the ability to download books even if the other conditions appear satisfactory. Thus, confirming system compatibility ensures that users can access and utilize the iBook Store effectively.