A web-commerce application stores its data in an Amazon Aurora DB cluster with an Aurora replica. The application displays shopping cart information by reading data from the reader endpoint. When monitoring the Aurora database, the SysOps Administrator sees that the AuroraReplicaLagMaximum metric for a single replica is high.
What behavior is the application MOST likely exhibiting to users?

A. Users cannot add any items to the shopping cart.
B. Users intermittently notice that the cart is not updated correctly.
C. Users cannot remove any items from the shopping cart.
D. Users cannot use the application because it is falling back to an error page.