How does the structure of "Mending Wall" affect the poem?
(a) The poem is in one unrhymed stanza, enforcing an ongoing conversation.
(b) The poem is in multiple unrhymed stanzas, showing fragmented conversation.
(c) The poem is in one rhyming stanza, emphasizing the speaker's opinion on borders.
(d) The poem is in multiple rhyming stanzas, representing different time periods.
