What poetic element is used in this excerpt from john milton's paradise lost?

regions of sorrow, doleful shades, where peace
and rest can never dwell, hope never comes
that comes to all; but torture without end
still urges, and a fiery deluge, fed
with ever-burning sulphur unconsum'd:

a. complex syntax
b. tetrameter
c. blank verse
d. iambic pentameter