A company recently adjusted its load-balancer encryption policies to support only TLSv1.3. Soon after the change was made, several customers began reporting they could not access their website. Which of the following is the MOST likely cause of the issue?

A. The certificate is expired.
B. There is a mismatch between the key and the certificate.
C. The customers are using an unsupported OS.
D. The load balancer was misconfigured.