Which of the following best describes Secure Electronic Transactions?

Which of the following best describes Secure Electronic Transactions?

A.
An Internet standard that projects merchants by verifying identities of customers, and protects customers by shielding their card numbers from merchants.

B.
A protocol that uses encryption in which one key is used to encrypt and decrypt the messages sent over a secure line.

C.
An Internet standard designated to increase the fulfillment process.

D.
The interorganizational exchange of documents in standardized electronic form directly between participating computers.