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Which scenario describes the most reliable source for consumers researching a possible purchase?

The marketing department for an online athletic-wear company writes descriptions for each product. They accompany the descriptions with photographs that show happy, active people wearing their products.
An independent consumer group uses a set of standards to rate and review products in several categories. They publish their ratings and reviews so consumers can evaluate different choices.
Olivia has a popular cooking blog. In addition to posting recipes, she endorses kitchen appliances and provides links to sites where they can be purchased. She receives money each time a user clicks on a link.
Marcus reviews products he buys online. His reviews only discuss what he dislikes about the products. He never gives a rating higher than two out of five stars, even when he is happy with a purchase.