In the play, Macduff responds to Malcolm's challenge by saying, 'I must also feel it as a man'. What does this response imply about Macduff's character?
1) Macduff is willing to face any challenge with courage and determination.
2) Macduff is afraid to confront Malcolm and tries to avoid the dispute.
3) Macduff is unsure about how to respond to Malcolm's challenge.
4) Macduff is angry and wants to fight Malcolm.