Which of the following was developed by Visa and MasterCard as a way of securing credit card transactions?

A.
IPSec

B.
SSH

C.
SSL

D.
SET

Explanation:
Secure Electronic Transaction (SET) has been a suggested substitution
for the way that SSL is being used today to provide secure electronic transactions.
But the required overhead, added software, and infrastructure has stood in the way
of this technology being fully adopted.