Read the excerpt from "The Storyteller."

The child moved reluctantly to the window. "Why are those sheep being driven out of that field?” he asked.

"I expect they are being driven to another field where there is more grass,” said the aunt weakly.

"But there is lots of grass in that field,” protested the boy; "there’s nothing else but grass there. Aunt, there’s lots of grass in that field.”

"Perhaps the grass in the other field is better,” suggested the aunt fatuously.

"Why is it better?” came the swift, inevitable question.

"Oh, look at those cows!” exclaimed the aunt. Nearly every field along the line had contained cows or bullocks, but she spoke as though she were drawing attention to a rarity.

"Why is the grass in the other field better?” persisted Cyril.

Which instances of situational irony occur in the passage? Select two options.