单项选择题
Given a complete loss of your database， in what order would you need to perform the following RMAN operations to restore it？（）
a. restore controlfile
b. restore database
c. restore spfile
d. recover database
e. alter database open
f. alter database open resetlogs
A. b， a， c， d， e
B. a， c， b， d， f
C. c， a， b， d， e
D. c， a， b， d， f
E. e， a， b， d， c
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