Which of the following is an EASY-to-implement first step for a small business owner to protect against AI voice clone CEO fraud targeting their accounts-payable clerk?

• A.Establish a written policy that all wire transfers and payment instruction changes require a callback to the vendor or executive on a pre-registered phone number, regardless of how the request arrived
• B.Switch all vendor communications to encrypted email so AI voice cloning cannot intercept messages
• C.Install enterprise-grade deepfake detection software on all employee workstations; synthetic voice is watermarked by law in the US and EU, and telecom carriers strip unwatermarked synthetic audio from calls in transit
• D.Require employees to attend a full-day AI security certification course before handling payments