Initially Duncan is the king in Macbeth, however Macbeth later kills him and becomes king himself.
Burthen - meaning, weight, significance
Recompense-reward
Loon-a silly or foolish person
Rill-a small stream
Measure-the rhythm of a piece of poetry or music
<u>Explanation:</u>
The words that have been given in the poem have meanings like rill means a small stream, a loon person is one who is silly or a foolish person. Recompense is the reward given for the compensation of the loss.
Burthen is the archaic form of "burden" which means "weight/significance/or meaning". All these words add meaning to the lines of the poem and help the readers understand the meaning of the poems by measuring those.
I think it B. but I'm not 100% sure (And yes I've read the book)
D. a formal poem using extensive repitition.