215. Which of the following is a proximity identification device that does not require action by the user and works by responding with an access code to signals transmitted by a reader?

Вариант ответа 1 - A. A smart card

Вариант ответа 2 - B. A transponder

Вариант ответа 3 - C. A passive system sensing device

Вариант ответа 4 - D. A card swipe