Answer:
The correct answer is "product advertisement"
Step-by-step explanation:
Product advertisement is designed to convince the consumer to buy a specific product and brand. The advertisement of a particular product usually appeals to the intended audience´s profile.
The rest of the options are incorrect since a licence agreement is a contract in which the user agrees to terms and conditions for using a specific software for example. A user`s guide provides the instructions on how to use a product. And a business letter is a type of letter that uses business vocabulary.