I do not think that any of the above were options in the first place.
due to following reasons
1.there was good likelihood that if such orders were given lost of lives will be countless and he may loose little vote base he got now.
2. He could also be shot by an army any time
3.If he could not stop Galle Face attack , his authority had diminished with three forces and police.
4.likelihood of more people joining and he ended up as Gadafi!
5.All his advisors such as Wimal, Dr.Padeniya, had jumped overboard so he had no one to support (may be corrupt Kamal was the only exception)