What Does the Phrase Honji Suijaku Imply in the Japanese

What does the phrase honji suijaku imply in the Japanese tradition?

A) One must rely on one's own power to achieve spiritual enlightenment.
B) Shinto is the one true national religion of Japan.
C) Shinto shrines can be built within Buddhist temples, and vice-versa.
D) The highest honour is to sacrifice oneself for Japan.
E) Kami are local manifestations of buddhas or bodhisattvas.