I believe the correct answer is B. form utility.
This refers to the actual appearance of the product, which is something that only the maker of that particular product can alter or change. Possession utility refers to all the benefits the customer has from that product once they have already purchased it, so the maker doesn't have anything to do with it. Place utility refers to where the product is sold, which again, the maker doesn't decide, but rather the entire company. Time utility refers to when the product is going to be available, which again depends on the company itself rather than the maker.