To answer the question, refer to the following excerpt from the poem, “Spring and All" by William Carlos Williams.

Spring and All

By the road to the contagious hospital
under the surge of the blue
mottled clouds driven from the
northeast-a cold wind. Beyond, the
waste of broad, muddy fields
brown with dried weeds, standing and fallen

patches of standing water
the scattering of tall trees

All along the road the reddish
purplish, forked, upstanding, twiggy
stuff of bushes and small trees
with dead, brown leaves under them
leafless vines-

Lifeless in appearance, sluggish
dazed spring approaches-

They enter the new world naked,
cold, uncertain of all
save that they enter. All about them
the cold, familiar wind-

Now the grass, tomorrow
the stiff curl of wild carrot leaf
One by one objects are defined-
It quickens: clarity, outline of leaf

But now the stark dignity of
entrance-Still, the profound change
has come upon them: rooted, they
grip down and begin to awaken

Looking at the structure of this poem, the enjambments are used to—
a) stress the last syllables of the line to create a dramatic form of speech
b) encourage the reader to move to the next line to continue to thinking about the idea expressed in the line before
c) make the reader come to a full stop at the end of the line
d) to give rhythm to the poem make the reader take a breath to mirror the natural rhythm of speech