Question: In a Cell Broadcast Service (CBS) scenario, as per 3GPP standards, what determines the presence of the `No-of-Broadcasts-Completed-List` in a `STATUS-MESSAGE-QUERY Response/Confirm` primitive sent by the BSC/RNC to the CBC?
Option 1: The presence of cells that successfully performed the requested operation, with known old message references.
Option 2: The total number of cells indicated in the related `STATUS-MESSAGE-QUERY Request`.
Option 3: The availability of CBCH (Cell Broadcast Channel) across all cells in the network.
Option 4: The failure rate of broadcast messages across the entire network.
Explanation: According to the specifications, the `No-of-Broadcasts-Completed-List` is present if there are cells that successfully performed the requested operation and for which the old message reference is known. This list provides details on successful broadcasts, including the number of times a CB message was sent to each cell for broadcast, but only includes cells with known old message references.