You have an Azure subscription that contains a storage account named storage1 in the North Europe Azure region. You need to ensure that when blob data is added ...

You have an Azure subscription that contains a storage account named storage1 in the North Europe Azure region.
You need to ensure that when blob data is added to storage1, a secondary copy is created in the East US region. The solution must minimize administrative effort.
What should you configure?

A. operational backup B. object replication C. geo-redundant storage (GRS) D. a lifecycle management rule