Answer:
B. It enhances the shocking effect.
Step-by-step explanation:
Enjambment is the continuity of a sentence without a pause outside the limits of a line or stanza.
In the excerpt from "Porphyria's Lover," the author Robert Browing makes use of enjambment to cause readers to feel surprised, upset and stunned by the speaker's confession that he killed his lover, Porphyria, by strangling her.