Which advertisement technique involves using claims that sound technical?

The correct choice is Jargon because this advertising technique specifically refers to the use of specialized language or technical terms that may sound impressive or credible to the audience. By incorporating jargon, advertisers seek to convey a sense of authority and expertise regarding their products or services, which can lead consumers to perceive the offering as more trustworthy or advanced. This technique plays on the assumption that complex language and concepts equate to superior quality or efficacy, even if the average consumer may not fully understand the terms being used.

In contrast, testimonials rely on endorsements from satisfied customers or celebrities, emotional appeal seeks to evoke feelings that resonate with the audience, and comparison often involves contrasting one product with another to highlight features or benefits. Each of those techniques serves different purposes but doesn't specifically center around the use of technical-sounding language.