Read the excerpt from the poem "Barbara Frietchie."



Up from the meadows rich with corn,

Clear in the cool September morn,

The clustered spires of Frederick stand

Green-walled by the hills of Maryland.



What makes these rhyming couplets?

AThe words in each line present a complete thought.

BThe words "rich," "cool," and "green-walled" describe the setting.

CThe words "clear" and "cool" start with the same letter.

DThe words at the end of each set sound alike.