Why are these lines from act iii important in the plot of the play?

macbeth to lady macbeth

the time has been,
that, when the brains were out, the man would die,
and there an end; but now they rise again,
with twenty mortal murders on their crowns,
and push us from our stools: this is more strange
than such a murder is

Which analysis of the text does this passage best support a) lady mcbeth shows how much she loves her husband by offering to take the blame for the kings murder b) lady mcbeth thinks her husband is a good man and wants him to forgive his plans to kill the king c) lady macbeth is considered that your husband didn’t have the nerve to kill the king and take the crown d) read mcbeth believes that her husband is evil and will murder others after he has killed the king