Read the passage:
"i don't think i like boys," answered the swallow. "last summer, when i was staying on the river, there were two rude boys, the miller's sons, who were always throwing stones at me. they never hit me, of course; we swallows fly far too well for that, and besides, i come from a family famous for its agility, but still, it was a mark of disrespect."

which provides the best evidence that the swallow is boastful?

"i don't think i like boys," answered the swallow.

"they never hit me, of course."

"last summer, when i was staying on the river . ."

"it was a mark of disrespect."