Which of the following statements is true about macbeth?
a. it was written as a tribute to england's king james of scotland, a supporter of shakespeare.
b. it was written as a warning to england's king henry viii, whose ambition concerned shakespeare.
c. it was written as a gift for mary, queen of scots, elizabeth's cousin and shakespeare's friend.
d. it was written as a statement on ambition and the power struggle between scotland's king james and the church.