Which of the Following Is the Best Example of Contributory

Which of the following is the best example of contributory negligence?

A) Juan is driving a car on University Drive. Alicia is driving a car on Elm Street. At the University/Elm intersection, which is a four-way stop, both cars run stop signs and collide.
B) Summer and Brandon accidentally sever a buried gas pipeline while digging in their backyard. This causes an explosion that damages their house.
C) Doc and Sharon own sheep, which escape from their enclosure. The sheep stray onto a neighbor's property, eating the corn and bean crops. The neighbor's land was not fenced.
D) Tyrell and Jasmine operate a neighborhood grocery. Blake, one of their customers, slips and falls on a slick spot. Blake was wearing sunglasses inside the store.