Which of the following supports more than two component-resident versions of firmware?

Which of the following supports more than two component-resident versions of firmware?
A. mezzanine adapters
B. I/O modules
C. Cisco UCS fabric interconnects
D. CIMCs

Correct Answer: C
Explanation/Reference:
Explanation: https://www.cisco.com/c/en/us/support/docs/servers-unified-computing/ucs-manager/110511-ucsfw- mgmt-00.html
https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-manager/GUI-UserGuides/Firmware- Mgmt/3-1/b_UCSM_GUI_Firmware_Management_Guide_3_1/b_UCSM_GUI_Firmware_Management_Guide_3_1_chapter_011.html#task_C8E850B883D741B FBEF0F BBA409C6CB7
The Fabric Interconnects are the only components that can store more than two versions.