any help please?

In 2004, a large department store chain in Germany was forced to withdraw customer loyalty cards when the press discovered that the company had secreted radio-frequency Identification (RFID) tags in the plastic. Even when enclosed in a wallet or purse, these cards can transmit Information over distances of about a meter, and the stores planned to use them to track which departments the customer visited. At Issue was which data security Issue? O unauthorized access O chat rooms O sexual innuendoes expressed through lewd humor biometrics O consumer privacy