Final answer:
The advertising company has used testimonials to persuade you to get the product.
Step-by-step explanation:
The advertising company has used the technique of testimonials to persuade you to get the product. Testimonials involve using statements or endorsements from individuals (in this case, doctors) to convince the audience of a product's effectiveness. By claiming that 85% of doctors use their product, the company is trying to build trust and credibility with potential customers.
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