Final answer:
In 'Much Ado About Nothing', Don John is to blame for Claudio's accusation of Hero's infidelity because he orchestrates the deceitful plan that makes Hero appear unfaithful.
Step-by-step explanation:
In the play Much Ado About Nothing by William Shakespeare, the person to blame for Claudio accusing Hero of cheating on him is B) Don John. In the plot, Don John, motivated by his jealousy and resentment, orchestrates a deceitful plan to suggest Hero's infidelity. He manages to convince Claudio and Don Pedro that Hero is unfaithful using clever manipulation. Despite Claudio's hasty judgment, the blame lies primarily with Don John for his calculated deception.
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