What type of backup do you recommend to improve the per…

A database is running in archivelog mode.
You want to back up a 10 TB data file belonging to the users tablespace. The backup of the data file is too slow.
What type of backup do you recommend to improve the performance of the backup?

A.
image copy backup by using RMAN

B.
multisection image copy backup by using RMAN

C.
multisection parallel backup by using RMAN

D.
cold backup after taking the tablespace offline

E.
cold backup after placing the tablespace in backup mode