Answer:
The correct answer is letter "A": Crabapple.
Explanation:
The U.S. Patent and Trademark Office or USPTO is an agency of the U.S. Department of Commerce that issues patents to the creators and companies for their inventions and, registers the brands for the identification of products and intellectual property.
In the case, Berry Good LLC has the right to suit Crabapple Inc. in front of the USPTO for selling without Berry's consent an imitation of Berry's frozen dessert.
It is A. the difficulty in maximizing total utility with budget constraints