Question: In a TDD (Time Division Duplexing) network, what is the primary purpose of the `BCCH-BCH-Message-TDD-NB` class as defined in E-UTRAN (Evolved Universal Terrestrial Radio Access Network)?
Option 1: To establish and manage dedicated radio bearers for User Equipment (UE)
Option 2: To broadcast system information from the E-UTRAN to UE via Dedicated Traffic Channel (DTCH)
Option 3: To handle handover procedures between different E-UTRAN cells
Option 4: To transmit Master Information Block (MIB) and other system information from E-UTRAN to UE via Broadcast Control Channel (BCCH)
Explanation: The `BCCH-BCH-Message-TDD-NB` class is designed for broadcasting essential system information, like MIB, from the E-UTRAN to UEs over BCCH in TDD mode, aligning with BCCH's primary purpose of disseminating crucial system and access information to all UEs within a cell's coverage area.