Answer:
C) the Defendant
Explanation:
From the question, We are informed about how Jack enters into a contract with Jill’s Farm to provide water for Jill’s irrigation needs, and how Jack fails to deliver. Jill initiates a suit against Jack, asking the court to order Jack to perform. In this case Jill is a Defendant. In a lawsuit, there will always be a defendant and a plantiff, the defendant is the party that is sued, while the plantiff is the party that raise the lawsuit. However, couter-complaint is allowed to be filed by the defendant against the plantiff if he/she want. Therefore Jill is the defendant here while Jack is plantiff.