Sentence 13 needs a question mark added to it because it is an interrogative sentence. It is asking what has been accomplished, and although rhetorical, still needs a question mark.
Often times, sentences that need a question mark will start with words like "what, who, when, where, why, and how." but can start with others.
Answer:
Massachusetts governor passed an Act against conjuration, witchcraft, and dealing with evil spirits. Earlier, the governor had also dissolved the court of oyer and terminer (this was the legal reform).
Explanation:
December 1962 was when the act was made, leading to an end to the Salem witch trials.
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