1. What was the main legal issue in the case of C. B. v. A. Co.?
2. What was the court's holding in C. B. v. A. Co.?
3. What arguments did A. Co. present regarding the similarities between the two works?
4. What elements were noted as being similar between C. B.'s and A. Co.'s works?
5. What is a key takeaway regarding the threshold for copyright infringement as established in this case?