Landowner Shelley subdivides her acreage and offers the lots for sale. Broker Ernie tells her that he can sell the lots. After Ernie sells some of the lots, the landowner refuses to pay him a commission. The broker can

A) report the landowner to the real estate licensing authorities.
B) file a lien against the landowner's remaining lots.
C) sue the landowner for breach of contract.
D) do nothing.

Answer: D) do nothing.