which would be the correct order to create a backup of an Oracle database in NOARCHIVELOG mode?

Given the following steps, which would be the correct order to create a backup of an Oracle database in NOARCHIVELOG mode?
1.shutdown immediate from RMAN
2.Log into RMAN
3.startup mount from RMAN
4.backup database
5.alter database open
6.backup database plus archivelog delete input

A.
2,3,1,4,5

B.
2,1,3,6,5

C.
1,3,5,4

D.
2,1,3,5,6

E.
2,1,3,4,5