C. to mock the manner of speaking that the writer is criticising
I believe the correct answer is hyperbole.
Hyperbole is a rhetorical figure of speech which show some kind of exaggeration - in this particular example, the hyperbole is found in the words 'an hundred years.' This is so because the poet won't really spend a hundred years to praise the woman's eyes, but is rather exaggerating a bit.
The answer is E.
Hope it helps!
