Which of the following is a disadvantage of a memory only card?

A.
High cost to develop.

B.
High cost to operate.

C.
Physically infeasible.

D.
Easy to counterfeit.

Explanation:
Memory Only Card – This type of card is the most common card. It has a magnetic stripe on the back.
These cards can offer two-factor authentication, the card itself
(something you have) and the PIN (something you know). Everyone is familiar with the use of an
ATM (Automated Teller Machine) card. These memory cards are very easy to counterfeit. There was
a case in Montreal where a storeowner would swipe the card through for the transaction; he would
then swipe it through a card reader to get a copy, while a small hidden camera was registering the
PIN as the user was punching it on the pad. This scheme was quickly identified as the victims had
one point in common;
they all visited the same store.