Based on the context of the Kansas women's suffrage movement and the timeline provided, the statement that best completes the chart is:
D) Da nation's first popular referendum on women's suffrage fails.
This is because the first referendum for women's suffrage in Kansas took place in 1867, and it is notable as one of the first attempts at a popular vote on this issue in the United States, which aligns with the historical context of women's suffrage efforts.