SAT Question 8d88740e: Central Ideas And Details answer and explanation

English - Central Ideas And Details - Inference
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The following text is adapted from William Shakespeare’s 1597 play The Tragedy of King Richard III. Richard is reflecting on the recent arrest of his brother, the Duke of Clarence, on suspicion of treason against King Edward IV. Derby, Hastings, Buckingham, Rivers, Dorset, and Grey are also members of the English nobility. RICHARD: I do the wrong, and first begin to brawl. The secret mischiefs that I set [flowing] I lay unto the grievous charge of others. Clarence, whom I indeed have cast in darkness, I do beweep to many simple [gullible people], Namely, to Derby, Hastings, Buckingham; And tell them ’tis the Queen and her allies That stir the King against the Duke my brother. Now they believe it, and withal whet me To be revenged on Rivers, Dorset, Grey.
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Difficulty:Hard
Which choice best describes what happens in the text?