Question: What is a mandatory action for an APDU tool if it encounters an error in the data or status returned from a card TPDU (Transport Protocol Data Unit)?
Option 1: Ignore the error and continue with the next command
Option 2: Send a reset command to the card
Option 3: Return an error
Option 4: Automatically correct the perceived error
Explanation: The APDU tool is designed for testing and validating interactions with a (U)SIM card. If there's an error in data or status returned, the tool must handle this situation to ensure test reliability and accuracy. Returning an error allows for the identification and potential resolution of the issue, aligning with robust testing practices.