D. For the reader to feel the rhythm of the marching echoed in the silently reading poem
Explanation:
The meter of the poem mimics the rhythm of the marching of the soldiers. It alternates between stressed and unstressed syllables almost as though it's beating a drum to keep time with the soldiers' steps.
I don't know everything but 7 is English if you were born in a country where English is spoken. 9 is Latin I think 4 is bilingual and unfortunately I don't know more
