In Act 4 of "The Crucible," several significant developments occur in Salem:
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Executions and Imprisonments: Many townspeople have been executed or imprisoned as a result of the witch trials. This has created a climate of fear and desperation.
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Loss of Faith in Authority: People have turned against Reverend Parris, who is seen as more concerned about his own reputation and safety than the truth or the well-being of the community.
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Fear of Abigail Williams: Abigail, once a central figure in the trials, has become a source of fear and unrest due to her manipulative actions and the chaos she has incited.
Given these points, the correct answer is "All of the above." Each of these statements reflects the deteriorating situation in Salem during the course of the play.