Question: Upon receiving a Proactive UICC Command with SW1/SW2 of '91 0B' after a PROFILE DOWNLOAD procedure, what action should the Mobile Equipment (ME) take next in accordance with USIM Application Toolkit conformance?
Option 1: Send the TERMINAL RESPONSE command with command number "01", type of command "02" and command qualifier "00".
Option 2: Initiate another PROFILE DOWNLOAD procedure to clarify the command.
Option 3: Ignore the Proactive UICC Command until user input is received.
Option 4: Send the FETCH command to the UICC to retrieve more information.
Explanation: According to the specified procedure, after indicating a pending Proactive UICC Command with SW1/SW2 of '91 0B', the ME should prepare for a structured response. While the immediate step isn't directly described here, the protocol's emphasis on structured communication guides us towards preparing a TERMINAL RESPONSE, similar to when receiving MORE TIME, implying an aligned preparatory action for Proactive Commands.