What is wrong about the description of the fusionstorage component
A. fusionstorageManager provides alarm, monitoring, log, configuration, and other operation and maintenance functions
B. MDC: Metadata control, realizing state control of distributed clusters, and controlling data distribution rules, data reconstruction rules, etc
C. VBS, virtual block storage management software, is responsible for the management of volume metadata, provides distributed cluster access point services, and enables computing resources to pass through VBSAccess distributed storage resources
D. OSD: Object storage device services, perform specific I/O operations