Where have we heard Birnam Wood before? Why is this mentioned in this scene? Act 5 Scene 2 Macbeth

Asap select 4 statements which could be considered a "theme" of a story, play, poem, etc. a sometimes the most profound ideas can come from unfamiliar places. b my best friend jeffrey has many unusual interests. c once a man gives his soul over to evil, he can never go back. d the three sheepdogs lay around the yard all day. e a priest's collar has an unusual effect upon people. f innocence is a powerful force in a world full of corruption. g king lear is a play shakespeare wrote later. h evil often wears the disguise of innocence. the answer is a c f h