What does the following quote from Elpenor tell us about Greek culture?

No, burn me in full armor, all my harness,
heap my mound by the churning gray surf—
a man whose luck ran out—
so even men to come will learn my story. (11, 82-85) *

A. The Greeks thought that a blood sacrifice could animate the dead.
B. The Greeks thought that a proper burial was essential to the happiness of the dead.
C. The Greeks thought that being buried with armor would provide protection from other spirits in Hades.
D. The Greeks thought that enough fame could grant immortality to the dead.

This dialogue occurs when Odysseus encounters Elpenor in the underworld. Elpenor has died, and his body was left in Circe's island. He asks Odyssey to go back, and find his body, in order to give him a proper burial (in full armour, with all his harness). The implication here is that Elpenor is asking this because he cannot rest in peace until his burial is taken care of. This shows that the Greeks considered a proper burial necessary for the happiness of the dead.