Which of the following best describes the tone of Percy Bysshe Shelley's 'Ozymandias'?

The poem is ironic because the proud inscription 'Look on my works, ye Mighty, and despair!' is surrounded by nothing but empty desert, mocking Ozymandias's arrogance. The tone is also melancholic as it meditates on the inevitable decay of all human power and achievement. Shelley uses this irony to make a philosophical point about the futility of pride.