Simone was walking down the street when suddenly her heel became lodged in a sidewalk crack. She fell and broke her leg, but a man rushed over and quickly tied a tree limb to her leg and began treating an open cut. He then wrote her a bill for $150.00 for serviced rendered. What type of contract allows for this?
A. Quasi-contract
B. Expressed contract
C. Medical contract
D. Medical injunction