Refer to the exhibit.

WPA2-Personal authenticates clients with a preshared key, not with 802.1X. Cisco documents WPA/WPA2 as supporting multiple authentication methods, including 802.1X and PSK, and specifically states that when PSK is selected, a preshared key or passphrase must be configured. The configuration element that enables client authentication in this scenario is the PSK ASCII key function represented by option D. On Catalyst 9800 IOS XE, the PSK method is enabled with PSK authentication key management, and the passphrase is defined withsecurity wpa psk set-key {ascii | hex} {0 | 8} password; Cisco’s example issecurity wpa psk set-key ascii 0 test.

Option A disables 802.1X AKM, which is appropriate for Personal mode, but it does not by itself authenticate clients. Option B controls DHCP proxy behavior and has no role in WPA authentication. Option C enables AES for WPA2 encryption, which protects traffic confidentiality but does not supply the authentication secret. Reference topics:Client Connectivity Configuration — WPA2-Personal, PSK authentication, AKM selection, AES encryption, and Catalyst 9800 WLAN security configuration.