Shelley’s greatest achievement is his four-act poetic drama（ ）,

Shelley’s greatest achievement is his four-act poetic drama（ ）, which is an exultant work in praise of humankind’s potential.
A、Adonais
B、Queen Mab
C、Prometheus Unbound
D、Defence of Poetry
【正确答案】：C
【题目解析】：雪莱的最伟大的成就是他的四幕诗剧《解放了的普罗米修斯》，这是赞美人类潜能的佳作。