What is the letter answer?

You are the Chief Information Security Officer $($CISO$)$ for a startup specializing in financial technology $($FinTech$).$ Your company is preparing to launch a new online payment system. Given the potential for economic loss and regulatory scrutiny, understanding the company's risk appetite is crucial for making informed security investment decisions. Which statement BEST describes the concept of "risk appetite"?

A$.$The maximum amount of risk the company is willing to accept before taking action

B$.$The total cost of implementing all recommended security measures

C$.$A detailed list of all potential security threats to the payment system

D$.$The minimum security measures required by financial regulations