Which action do historians take when using the historical thinking skill of
periodization?

the world may never know

the court ruled that a state law that banned abortions (except to save the life of the mother) was unconstitutional

hope this : )

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.