The only thing on there that actually made sense was the Dry:Air, but flood doesn't mean air. :/
Answer:
A. Do nothing different than when signing for a single person
Explanation:
Because Brutus is deceiving him
After the murder, Macbeth describes him of struggling to say 'Amen'. His attempt to pray is rejected, meaning that God will not bless him rather he is cursed to the evil deeds; killing Duncan when he is sleeping.