Concept:The word "chosen" refers to something picked out from a group. The best synonym expresses direct selection.
Explanation:"Chosen" is the past participle of "choose".
It means to pick or select someone or something from a set of options.
When poems are "chosen", they are picked specially from other poems.
Among the options, "selected" carries exactly this meaning of picking out deliberately.
"Preferred" means liked more, but not necessarily picked.
"Prescribed" means officially recommended or required.
"Given" means provided or supplied, not picked.
Therefore, the closest in meaning is "selected".
Answer:B. selected