Read the following passage and answer the questions that follow. The fog came in low and slow, settling...

Read the following passage and answer the questions that follow.
The fog came in low and slow, settling over the salt flats like a shroud drawn soft across the earth. Somewhere beyond the gray, a bell buoy groaned and fell silent, groaned and fell silent, its rhythm a slow and muffled pulse. She stood at the edge of the water where the land gave out—not stepping forward, not stepping back—and felt the weight of the air press down the way grief does: not sharp, not sudden, but everywhere at once, patient as stone.
15.
The repetition of "groaned and fell silent, groaned and fell silent" most closely resembles which poetic device, and what effect does it create?
a.
Caesura, which isolates an image by interrupting the sentence's momentum
b.
Anaphora, which builds meaning through insistent return and communicates something unrelenting
c.
Metrical substitution, which disrupts the passage's rhythm at a moment of tension
d.
Slant rhyme, which creates the sense of reaching for resolution and falling short