challenge: What is the title of the 2004 book by Jonathan Rauch that advocates for the legal and social recognition of same-sex marriage?
  
  A. Marriage Equality: A Moral Imperative
  B. Same-Sex Marriage: A Human Right
  C. The Case for Gay Marriage
  D. Gay Marriage: Why It Is Good for Gays, Good for Straights, and Good for America
  Answer: 