Which title indicates that the text is a secondary source?
A
Personal Memoirs of U. S. Grant, by Ulysses S. GrantB
The American Diary of a Japanese Girl, by Yoné NoguchiC
Sir Christopher Wren: Scientist, Scholar and Architect, by Sir Lawrence WeaverD
Napoleon's Letters to Josephine, 1796-1812, by Emperor of the French Napoleon I