Answer:
C. by citing the inspiration for each example of narrative poetry.
Step-by-step explanation:
The author communicate that modern narrative poetry is similar to traditional or ancient narrative literature by citing the inspiration for each example of narrative poetry.
The author says that narrative poetry keeps on evolving and is inspired by other older narrative poems. He mentions narrative poetries such as "Song of Hiawatha", "Idylls of the King" , "The Ballad of the Harp-Waever", etc. as some narrative poetries which were inspired by other earlier poetries.