is the sentence "the prosecution presented its case so well that it would be a surprise for the jury to return a verdict of not guilty." a complex or compound sentence ?

What effect do the stanzas have on the meaning of this poem? a) each stanza asks the same question in different words. b) the stanzas do not work together to create meaning in the poem. c) each stanza presents a different aspect of the creation of the tiger. d) each stanza presents questions that are answered in the last stanza.