A security administrator is trying to encrypt communication. For which of the following reasons should administrator take advantage of the Subject Alternative Name (SAM) attribute of a certificate?

While the SAN attribute enables a single certificate to protect multiple domains by listing them, 'extended site validation' (B) more precisely describes the technical *reason* the certificate is trusted for these multiple identities.

The SAN attribute allows an SSL/TLS certificate to specify multiple distinct hostnames, IP addresses, or URIs for which the certificate is valid. When a client connects to any of these listed identities, it can successfully validate the certificate against the accessed hostname, effectively extending the scope of identity validation beyond a single common name.

Publicly trusted SSL/TLS certificates, including those utilizing SANs, fundamentally require issuance by a trusted Certificate Authority (CA) to be automatically trusted by client devices and browsers.

The SAN attribute allows explicit listing of multiple specific subdomains; however, it does not provide generic 'unlimited' subdomain protection, which is typically a function of wildcard certificates.