What literary device is shakespear using in the passage?
Macbeth Act IV, Scene ii
HECATE: O well done! I commend your pains;
And every one shall share i' the gains;
And now about the cauldron sing,
Live elves and fairies in a ring,
Enchanting all that you put in.
A. Sarcasm
B.Tone
C.Understandment
D. Irony