Final answer:
b) She is consumed by guilt. Lady Macbeth is consumed by guilt, which leads to her debilitation and inability to support Macbeth against Malcolm.
Step-by-step explanation:
Lady Macbeth becomes debilitated and unable to support Macbeth against Malcolm because b) she is consumed by guilt. Her overwhelming sense of guilt emerges from her role in the murders that she and Macbeth have committed.
This is evident in her sleepwalking scene where she attempts to wash the imaginary blood from her hands, symbolizing her deep remorse and the psychological torment she experiences because of her actions. Lady Macbeth's guilt leads her to mental instability, rendering her incapable of further supporting her husband's reign.
Lady Macbeth becomes debilitated and unable to support Macbeth against Malcolm primarily because of overwhelming guilt. In Shakespeare's play "Macbeth," Lady Macbeth is plagued by remorse and the psychological consequences of her involvement in the murderous deeds committed by Macbeth.
Her conscience becomes burdened by the guilt of Duncan's murder, and she sleepwalks, attempting to wash away imaginary bloodstains from her hands. This guilt-driven deterioration leads to her emotional and mental breakdown, rendering her incapable of maintaining the façade of strength and support for Macbeth as the consequences of their actions unfold.