In the following examples who is functioning as a producer?

The correct answer is c) Thornstan, who is writing a book that will be sold in bookstores around the world.

Explanation:

Producers are all people whose function is to create something; there are different types of producers that range from the film producer to the agricultural producer.

The producer is responsible for making a product and then sells it, sometimes with the help of someone else. For example, in the case of Thornstan, he is writing a book for which he becomes a producer since his book is the product, and this book will be sold all over the world with the help of bookstores and the publisher.

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can you tell me where are the ansawer choices

this doesn't support enough information to answer the question.