Which of the following is not among the four main islands of japan?
a. hokkaido
b. edo
c. shikoku
d. honshu

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.