Answer:
d. Jake and Leon.
Step-by-step explanation:
Based on the information provided within the question in regards to the situation at hand it can be said that in most states, Kendall can sue both Jake and Leon. This is because both Jake and Leon entered into a contract with Leon promising to install the automatic watering troughs and both failed to do so. Regardless of their reason they breached the binding contract and Kendall can sue them both if he chose to do so.