Lili went shopping at 123 Tile. She saw some tile she liked but could not make up her mind. The manager at 123 Tile wrote down the proposed purchase price for her along with a statement that the price would be good for three months. Two months later Lili went back to 123 Tile to purchase the carpet. Unfortunately, the price had gone up. Lili showed the manager his writing and guaranteed price, but the manager said that the offer was no longer good.

What kind of offer did the manager at 123 Tile make to Lili?

Group of answer choices

An unenforceable offer

A mirror offer

A consideration offer

A firm offer

An illusory offer