单选题：Assuming modules for all supported filesystems have been loaded,

Assuming modules for all supported filesystems have been loaded, which file contains a list of filesystems that can be currently mounted on the system? @[A](1)
A. /proc/filesystems
B. /dev/filesystems
C. /etc/filesystems
D. /var/fs/filesystems




A./proc/filesystems
B./dev/filesystems
C./etc/filesystems
D./var/fs/filesystems


答案：A