在/etc/cinder/cinder.conf文件中默认设置的默认调度器是
A. sheduler_driver=cinder.filter_scheduler.FileterScheduler
B. sheduler_driver=cinder.filter_scheduler.FileterScheduler
C. sheduler_driver=cinder.scheduler.filter_scheduler.FileterScheduler
D. sheduler_driver=cinder.scheduler.FileterScheduler