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The correct answer among the choices is option A. The statement "Masks played an important role in Haida history." best summarizes the passage. The sentence in option A was rephrased from the thesis statement of the paragraph. The other choices gave specific practices of Haida people.
Answer: The purpose of vaccination is to produce immunity. Immunity means the presence in a person's body of cells and substances known as antibodies that can produce a protective immune response.