Joan's lawyer, Albert, feels pretty good about the chances of winning Joan's case. He has found a case directly on point, which means it has the same issue and very similar facts. If the court follows the decision in the case Albert found, then Joan will win her case. Albert argues Joan's case to the trial court, and the trial court decides for Joan. The fact that the trial court decided the case in Joan's favor is an example of:

a. common law.

b. stare decisis.

c. precedent.

d. persuasive authority.