Final answer:
The most helpful content for Dog-owner Dia in the consideration stage is customer reviews and testimonials on different dog food brands, as they provide real-world evidence and help in making a well-informed decision.
Step-by-step explanation:
The most helpful content for Dog-owner Dia in the consideration stage of choosing dog food would be C) Customer reviews and testimonials on different dog food brands. In the consideration stage, consumers are looking at their options and weighing the benefits of one product over another. Detailed customer reviews and testimonials can provide real-world evidence of the effectiveness and quality of different dog food brands, helping Dia make a well-informed decision.
Other options like a blog post on general pet ownership or a video showcasing production process might be informative but are less likely to influence Dia's decision at this stage. Instead, a quiz to determine the ideal dog food based on the dog's breed could also be helpful, as it personalizes the decision-making process and narrows down the choices to what would be most suitable for her specific dog, but it is not as strong as real customer feedback.