Jason is the Chief Information Security Officer $($CISO$)$ at a major online retail platform operating in the United States. The platform processes a significant amount of credit card transactions daily. Jason is aware of the company's obligation to meet certain regulatory standards and also the severe consequences of noncompliance. He seeks to ensure that the company's practices for storing, processing, and transmitting credit card information adhere to a particular standard. Which of the following regulations is Jason most concerned about?

A $$ PCI DSS

B SOX

C HIPAA

D GDPR