What important change happens in the last six lines of the sonnet The New Colossus

What important change happens in the last six lines of the sonnet "The New Colossus"? *
a. The poet alters the direction of the poem by introducing metaphors
b. The poet distinguishes between America and ancient lands
c. The poem's meaning is summarized in words spoken by the Statue of Liberty
d. The physical features of the Statue of Liberty are described in detail