What type of data does the term "sensitive authentication data" encompass?

The term "sensitive authentication data" specifically refers to information used to authenticate or validate the identity of a cardholder, particularly in regards to payment card transactions. This category of data is crucial because it must be protected to prevent fraud and unauthorized transactions.

Full track data pertains to the information encoded on a payment card's magnetic stripe. This includes detailed data that is used when a card is swiped for a transaction. The CAV2, CVC2, CVV2, and CID are additional security codes that provide an extra layer of protection against unauthorized use of a card, as they are usually required for card-not-present transactions, such as online purchases.

The other types of data mentioned, while sensitive, do not fall under the strict definition of "sensitive authentication data" as provided by standards like the Payment Card Industry Data Security Standard (PCI DSS). Social security and bank account numbers, employer identification numbers, driver’s licenses, and cardholder contact information are important and sensitive, but they are categorized differently when it comes to authentication in the context of payment card transactions. Thus, the correct choice accurately identifies the specific data types that are considered sensitive authentication data due to their direct role in transaction validation and security.