premise: A company operates vending machines in four schools: Ferndale, Gladstone, Hafford, and Isley. The company delivers juices in one of its two trucks and snacks in the other truck. Each week, exactly one delivery of juices and exactly one delivery of snacks is made to each school, subject to the following conditions: Snacks must be delivered to Ferndale at some time before they are delivered to Hafford. Gladstone cannot be the fourth school to which juices are delivered. Gladstone must be the third school to which snacks are delivered. The first school to which juices are delivered must be the fourth one to which snacks are delivered. If Isley is the third school to which juices are delivered, which one of the following could be true?
hypothesis: Snacks are delivered to Ferndale at some time before they are delivered to Isley.