What is the meter of this line from “ode to the west wind” by percy bysshe shelley?

the wing | èd seeds | where they | lie cold | and low,
a.
trochaic pentameter (the foot has a stressed syllable followed by an unstressed syllable. this pattern repeats five times in the line.)
b.
trochaic tetrameter (the foot has a stressed syllable followed by an unstressed syllable. this pattern repeats four times in the line.)
c.
iambic tetrameter (the foot has an unstressed syllable followed by a stressed syllable. this pattern repeats four times in the line.)
d.
iambic pentameter (the foot has an unstressed syllable followed by a stressed syllable. this pattern repeats five times in the line.)