At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
i go with A.
Meter is a way of measuring a line of poetry based on the rhythm of the words.
As a reader, knowing about meter helps you understand how a poem is put together. You can see what rules the poet was following and how he or she used or went outside those rules. This lets you guess what was going through the poet's mind.
If you want to write poetry, knowing about meter will make you a better poet. First, it helps you understand what poets have done in the past, so that you can learn from them. It allows you to use traditional forms such as sonnets. Even if you prefer to write in free verse, you should learn about traditional forms. Being aware of traditions gives you more flexibility to use aspects of them when you want to, or to "break the rules" in a more interesting way.