two students in a competition use a never before used formula to come up with a design independently. They were both given this formula by a mutual professor. One registers his copyright in the design, the other does not. A third student sees the work of the one who did not register the copyright, copied it and sold it to a firm. Which is true?

a)the cheating student is infringing on both the other students' copyright

b)the cheating student is infringing on both the other students' moral rights

c)the cheating student is infringing on the students copyright who registered it but not the other who did not

d)the cheating student is infringing on the student who did not register the copyright, but not the one who did since he copied the non registering student.