Question: What action does the MAC entity take when it successfully decodes a Transport Block (TB) on the Broadcast Channel (BCH)?
Option 1: Deliver the decoded MAC PDU to lower layers.
Option 2: Discard the decoded MAC PDU and wait for further instructions.
Option 3: Re-transmit the decoded MAC PDU on the BCH.
Option 4: Deliver the decoded MAC PDU to upper layers.
Explanation: When the MAC entity successfully decodes a TB on the BCH, it delivers the decoded MAC Protocol Data Unit (PDU) to upper layers for further processing and handling. This ensures that the received information is properly utilized by the relevant components of the network.