use of emcli to promote unmanaged databases

Hi,

I am reading the "Enterprise Manager Command Line Interface 12c Release 1 (12.1.0.4) E17786-18" Documentation and at Section "6.3 Promoting Discovered Targets" using the promote_disvovered_dbs.py script.

http://docs.oracle.com/cd/E24628_01/em.121/e17786.pdf

My understanding is that the promote_discovered_dbs.py script removes the necessity to promote the database manually. I have a large number of database targets (over 1000+) that need to be promoted, they are a mixture of RAC databases and Single Database instances.

My question is as follows:

1) Does the script only cater for Single Instance databases, and if YES?

2) Does that mean it will promote the single instances that belong to a RAC cluster?