Read the excerpt from act 5, scene 5 of The Tragedy of Macbeth. Macbeth is in his castle, waiting to be surrounded by the enemy army. He suddenly hears women crying, and his servant Seyton goes to investigate.

Macbeth. I have almost forgot the taste of fears;
The time has been, my senses would have cool’d
To hear a night-shriek; and my fell of hair
Would at a dismal treatise rouse and stir
As life were in’t: I have supp’d full with horrors;
Direness, familiar to my slaughterous thoughts
Cannot once start me.

How does Shakespeare develop the universal theme "the impact of the past on the present” in this excerpt?

by describing Macbeth’s fears of his bad dreams
by describing all the violence that Macbeth has forgotten
by showing how afraid of the world Macbeth has become
by showing that Macbeth has become numb to violence