Answer:
Learning the king expected his statue to crumble.
Explanation:
Situational irony is when something that is expected did not happen but rather, the exact opposite happens. This means that the expected outcome is not what happens, but far from it. The outcome is the complete opposite of the expected outcome.
In the given lines of the poem "Ozymandias" by Percy Bysshe Shelley, the additional situational irony is if the king expected his statue to crumble. It is obvious that King Ozymandias constructed the statue to last long and be a symbol of his power and influence. But ironically, the statue crumbles, leaving little to no evidence of his power. So, if he were to expect the statue to last long, the situational irony will be that he expected it to crumble.
Thus, the correct answer is the third option.