You have been assigned to write a research essay on women's suffrage (the right of woman to vote in America). Your current working research question is "What is women's suffrage?"

Which revision of this question would be more effective for your research?
Responses
A "What year did women receive the right to vote?""What year did women receive the right to vote?"
B "How many women are registered to vote in America today?""How many women are registered to vote in America today?"
C "Which amendment to the Constitution gave women the right to vote?""Which amendment to the Constitution gave women the right to vote?"
D "When did the suffrage movement begin and how did it achieve its goals?""When did the suffrage movement begin and how did it achieve its goals?"

D "When did the suffrage movement begin and how did it achieve its goals?"