Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to choose a jack russell puppy [title] Know the personality of the jack russell terrier. [step] You should know what you will be getting into when you decide to adopt a jack russell, to make sure the breed and your lifestyle are suitably matched. [substeps] Jack russell terriers tend to believe they are a lot bigger than they actually are.

Ending1: This means that they may tend to take on dogs that are bigger than them. Jack russells can be more prone to aggression than other breeds because instinctively they attack, rather than back down, when frightened. Ending2: Because of this, they have a personality that is said to be a defining characteristic of their breed. They are independent, artistic, obedience-motivated dogs that set out to do everything they believe in. Ending3: They will try to pretend that their owner is a lot larger and more powerful than them. This image may be too far fetched for an untrained eye to follow. Ending4: Though they are mostly bottom feeders, their personalities do match somewhat. They are highly intelligent and love to play.

Answer format: ending1/ending2/ending3/ending4