Question: What types of mobility are covered by the "Mobility from E-UTRA" procedure, as defined in the context of Radio Resource Control (RRC) for a UE in RRC_CONNECTED state?
Option 1: Handover to another E-UTRA cell on the same Core Network (CN), Cell Change Order to GERAN, and Enhanced CS Fallback to CDMA2000 1xRTT.
Option 2: Redirection to UTRA, Handover to NR, and Concurrent Handover to CDMA2000 HRPD without CS Fallback.
Option 3: Cell Update in the current E-UTRA cell, Intra-E-UTRAN handover without CN change, and Inter-RAT handover to Wi-Fi.
Option 4: Idle Mode Mobility, Paging Occasion Optimization for GERAN, and UTRA-specific Measurement Reporting.
Explanation: The correct answer is Option 1 because, according to the specifications, the "Mobility from E-UTRA" procedure indeed covers: Handover (e.g., to another RAT like NR or within E-UTRA to a different CN type), Cell Change Order (specifically applicable to GERAN, facilitating access or connection establishment with provided system information), and Enhanced CS Fallback to CDMA2000 1xRTT (which may include allocated radio resources in the target cell and can be combined with concurrent handover or redirection to CDMA2000 HRPD). The other options list procedures or mobility types not accurately described as part of the "Mobility from E-UTRA" procedure's primary coverage.