Which two file types can be found when you choose Software Upgrades, followed by TFTP File Management on the Cisco Unified Operating System Administration web page for Cisco Unified Communications Manager?

Refer to the exhibit.

Assuming that the administrator has never performed any manual custom uploads, which two file types can be found when you choose Software Upgrades, followed by TFTP File Management on the Cisco Unified Operating System Administration web page for Cisco Unified Communications Manager? (Choose two.)
A. IP phone configuration files
B. announcement audio files
C. ringer files
D. IP phone license files
E. sample music-on-hold audio files
F. softkey template files