What are the two characteristics of this scenario?

An engineer deployed two Cisco TelePresence MCU 5320 Servers in a stacked deployment. Each server has 20 HD Port licenses installed. During a 20-party 720p 30-fps conference, eight additional parties attempt to join the conference.
What are the two characteristics of this scenario? (Choose two.)
A. The Cisco 5320 MCU in a stacked deployment is capable of supporting 720p 30-fps without traditional cascading.
B. When the 21st party joins, the call is declined because all ports are already in use on the first Cisco TelePresence 5320 MCU.
C. The 21st party is cascaded into the conference, and the 22nd and additional parties are declined due to the overutilization of resources.
D. the additional conference attendees are able to join the conference in the same manner and layout configuration that they could join a single bridge that was able to handle all 28 parties.
E. The Cisco TelePresence MCU 5320 is capable of supporting a maximum of twenty 720p 30-fps calls when deployed in a stackable configuration, because each MCU is capable of managing only ten 720p 30-fps attendees.
F. The conference is auto-balanced and resources are re-optimized via the MCU API. Parties 1 through 19 are hosted on the first MCU, and parties 20 through 28 are cascaded to the second MCU using an additional port on each MCU forthe cascading.
G. The additional eight parties are cascaded into the conference on the second 5320 MCU, and an additional port license is used on each MCU to facilitate the bridging between the MCUs.