Lucy is writing a research paper on the history of the samurai warriors in Japan. While Lucy reads above an eleventh-grade level, she knows little about the topic and is looking for a source that would be a good starting point to help guide additional research. Which text best matches Lucy’s purpose?

an encyclopedia article titled "The Life of Samurai Warriors"
a book titled The Complete History of Warriors in Japan
a short story titled "The Last Samurai Warrior"
a college textbook titled A History of Japan