Answer:
B. He wanted to make the poem more concise and direct.
Step-by-step explanation:
Ezra Pound wrote a 30-line poem where he narrated his experience in a Paris metro station but he discarded this version because he did not like it.
Much later, he again tried narrating his experience, this time making the narration shorter than the first, but he again discarded it.
Finally, after reading Japanese hiakus, Mr. Pound finally wrote his experience in a two-line version that has now become immensely popular because of its length.
So, he reduced his poem from a 30-lined one to two lines because he wanted to make the poem more concise and direct.