Final answer:
E-trade commercials are known for featuring talking animals, like the famous talking baby, using humor to engage the audience rather than relying on factual information.
Step-by-step explanation:
Among the options provided, E-trade has become well known for having celebrity endorsements in their commercials.
E-trade is known for having talking animals, particularly a talking baby, in their commercials. These advertisements capitalize on humor and the innate cuteness of infants to drive their message home. While other forms of advertisement might use celebrity endorsements, positive emotions, or attractive models which are cues used in peripheral route persuasion, they typically do not focus on deep, factual information as the central persuasive element.