How does Shakespeare present Macbeth as nervous and scared in Act 1 scene 7?

If it were done when 'tis done, then 'twere well

It were done quickly: if the assassination

Could trammel up the consequence, and catch

With his surcease success; that but this blow

Might be the be-all and the end-all here,

But here, upon this bank and shoal of time,

We'ld jump the life to come. (Act 1, Scene 7)

Explanation:

Macbeth was ready to kill Duncan when he found out he was not named the king’s heir.  He was feeling very ambitious, since the witches told him he would be king.  However, when he returned home he was suddenly not so ready.  Killing the king suddenly seems like not such a good idea. Which prooves that she was nervous and scared!

the correct answer is "dissent"

explanation:

because dissent is when one or more judges express disagreement with the majority in court, in specific legal systems.   an   argument in opposition is presented to the court, with a different interpretation, or application.