the sentence that contains the main idea is that "chocolate has been found to be a cause of weight gain."
the paragraph is pointing out the fact that it has been <em>found </em>to cause weight gain but the paragraph goes on to say that some of the researchers don't dive deep enough.
i hope that was helpful :D
We can't push each other but that very fact kept getting pushed into my thoughts.
It is B: Education
:D
the teacher made this question easy so next time check your announcements ok? (im just assuming youre in k12)