Concept:The speaker warns that a baseless suspicion must be cast aside because it corrupts and degrades the very heart that holds it.
Explanation:In this scene, Othello wrongly doubts Desdemona’s faithfulness.
The speaker has just declared that she would stake her own soul on Desdemona being honest.
The phrase "Remove your thought" means "dismiss this suspicion" or "stop entertaining such an idea."
"It doth abuse your bosom" means that this thought torments and belittles the one who keeps it.
The suspicion is shown as an inward wound, degrading Othello’s own moral dignity rather than merely accusing his wife.
By nurturing the thought, Othello damages his own conscience and peace of mind.
Therefore, the intended meaning is that the thought makes him unworthy of himself.
In simpler words, he is told, "You demean yourself by thinking so."
Answer:D. You demean yourself by thinking so.