The correct answer is
C: In 1917, the Post Office would not mail a book by Dr. Ben-Zion Liber entitled Sexual Life: A Popular Science Book. The book, written in Yiddish, covered a variety of health topics, including healthy eating, family planning, and birth control. The postmaster declared the book non-mailable because it was obscene, until the author deleted an article titled “The Incomplete Intercourse” and edited some other pages.