Identify the simile in the following passage:
Hueitse said to Chuangtse, "I have a large tree, called the ailanthus. Its trunk is so irregular and knotty that it cannot be measured out for planks; while its branches are so twisted that they cannot be cut out into discs or squares.
o It stands by the roadside, but no carpenter will look at it.
o Your words are like that tree -
o big and useless, of no concern to the world
o its trunk is irregular and knotty