To the Oracle at Delphi
by Lawrence Ferlinghetti (excerpt)

"O long-silent Sybil,
you of the winged dreams,
Speak out from your temple of light
as
the serious constellations
with Greek names
still stare down on us
as a lighthouse moves its megaphone
over the sea
Speak out and shine upon us
the sea-light of Greece
the diamond light of Greece
Far-seeing Sybil, forever hidden,
Come out of your cave at last
And speak to us in the poet's voice
the
voice of the fourth person singular
the voice
of the inscrutable future
the
voice of the people mixed"

Select the correct answer.

Based on the excerpt, what is the meaning of the word "inscrutable"?

A. unavoidable
B. unpleasant
C. hopeless
D. foreseeable
E. mysterious