A cybersecurity trainer is designing a module on GenAI-enabled fraud for community bank customers. Which single behavioral change has the highest protective value to teach?

• A.Look for visual artifacts (blurry edges, unnatural blinking) in any video communication before trusting it
• B.Trust only requests that come by email since voice can be faked but email cannot, since detectors flag synthetic audio with 100% recall
• C.Hang up and call back on a number you independently know - whether the request came by phone, voice message, or video - before taking any financial action, no matter how urgent the situation sounds
• D.Check the caller ID carefully; verified caller IDs indicate legitimate callers