Degree - main subject

Hello guys, I have a question (it might sound stupid) : in the application, both at the completed studies section and at the ongoing studies section, we are required to give a main subject and a grade for it. Should I just choose one of the subjects of my bachelor degree which I consider most relevant (kinda hard because my degree is in business administration so they all kind of have the same importance) or does this refer perhaps to the degree dissertation and its grade? Thanks

I think it's the title of the program and average score... at least I put that!