Question: Upon receiving a `HandoverFromEUTRAPreparationRequest` message without a `dualRxTxRedirectIndicator`, what action(s) does the UE take regarding the `cdma2000-Type` set to `type1XRTT`?
Option 1: Ignore the `cdma2000-Type` and do not forward any related parameters.
Option 2: Forward only the `cdma2000-Type` to the CDMA2000 upper layers.
Option 3: Forward the `cdma2000-Type`, but only if `concurrPrepCDMA2000-HRPD` is present.
Option 4: Indicate a request to prepare handover or enhanced 1xRTT CS fallback, forward the `cdma2000-Type` to the CDMA2000 upper layers, and also forward the `rand` and `mobilityParameters`.
Explanation: According to the protocol specification for handling a `HandoverFromEUTRAPreparationRequest` without a `dualRxTxRedirectIndicator`, when `cdma2000-Type` is set to `type1XRTT`, the UE must not only indicate the preparation request and forward the type but also send additional parameters (`rand` and `mobilityParameters`) necessary for the handover or fallback process to the CDMA2000 upper layers. This ensures a seamless transition by providing all required information for the target system (CDMA2000 1xRTT in this case).