Answer:
<h2>C) Offering their food products and snacks.</h2>
Explanation:
Fad diets are like the fashion trends on nutrition, it's what people tend to use because "most people" do it too. In order to make people follow these "fad diets", advertisers promote their food products, snacks, or the most famous supplements which magically help you to improve your health even without exercising, causing a mislead to consumers. In most of the cases, people believe that just using this products, they will have a healthy condition, but what this ads don't say, it's the amount of dedication people have to invest. There are no magical products or miracle recipes.
It's important to realise that those "fad diets" are pretty dangerous, because offer products or diets with no scientific facts, leading to possible nutrition disorders, like instead of losing weight, people gain more weight, reaching obesity levels, which increases risks of heart attacks, strokes, and others.
<em>Therefore, the right answer is C.</em>