Answer :
The correct answer is D. The audience knows the boastful king's power did not last.
Dramatic irony refers to the fact that the audience knows something that characters in the text do not initially. So we know that Ozymandias/Ramesses II thought he was much greater than he actually was, and than what was written on his pedestal in the poem. A and B are incorrect because they are not dramatic irony, and C is incorrect as well because the characters in the poem also know that the traveler saw the statue - not just the audience.
Dramatic irony refers to the fact that the audience knows something that characters in the text do not initially. So we know that Ozymandias/Ramesses II thought he was much greater than he actually was, and than what was written on his pedestal in the poem. A and B are incorrect because they are not dramatic irony, and C is incorrect as well because the characters in the poem also know that the traveler saw the statue - not just the audience.