The wild oat seeds were stuck to the turtle's front legs, so when it was rolled off the road, the seeds fell off and onto the ground. The turtle then started moving, and while it was doing that, it covered the seeds with ground, and thus it planted them. One day, those seeds would grow into wild oats thanks to the turtle.
What I know of Sister Mary Joseph is from a disease. It is a nodule. Anyway, according to context, the best answer would be letter C. The word that best describes Sister Mary Joseph is Spiritual. This is because of the amount of biblical reference from the names.
A broken relationship can be fixed if the right channels of communication are provided. In case the author wants to show his or her friends that there is a possiblility to mend things, the bridge between them would be the best object to simbolize the means to work out the broken relationship. Figuratively, the bridge can create the path which will take each part to the other side to overcome past difficulties. The right option is C.