配置如下：[H3C] wlanradio-policy1[H3C-wlan-rp-1] clientmax-count20[H3C] wlanservice-template1clear[H3C-wlan-st-1] ssidvip[H3C-wlan-st-1] bindWLAN-ESS1[H3C-wlan-st-1] clientmax-count10[H3C-wlan-st-1] service-templateenable[H3C] wlanservice-template2clear[H3C-wlan-st-2] ssidH3C[H3C-wlan-st-2] bindWLAN-ESS2[H3C-wlan-st-2] clientmax-count15[H3C-wlan-st-2] service-templateenable[H3C] wlanapap1[H3C-wlan-ap-ap1] radio1[H3C-wlan-ap-ap1-radio-1] radio-policy1[H3C-wlan-ap-ap1-radio-1] service-template1[H3C-wlan-ap-ap1-radio-1] service-template2[H3C-wlan-ap-ap1-radio-1] radioenable假设此时ap1radio1的SSID“H3C”上已经连接13个无线客户端，则根据以上配置判断，ap1 radio1的SSID“vip”最多还可以连接（）个无线客户端。

A. 10
B. 7
C. 15
D. 20