Depart, retreat, retire

Which verb fits each sentence? (you'll have to use one of them twice)

a) At this point in the speech, the minister _________ from his prepared text.

b) After dinner the host said, "Shall we _________ to the drawing room?"

c) When he's done something wrong, he __________ to his bedroom.

d) Attacks by enemy aircraft forced the tanks to _________.

xoxo