Percy wrote this equation to represent the total number of books he carried in two bags. 12 = 7 + b Which situation could be described by this equation? A. Percy knows he has a total of 12 books. He knows he has 7 books in one bag. He does not know how many books he has in the other bag. B. Percy knows he has a total of 12 books. He knows he has 7 books in one bag. He does not know how many more books he has in the first bag compared to the other bag. C. Percy knows he has 12 books in one bag. He knows he has 7 books in the other bag. He does not know how many books he has altogether. D. Percy knows he has 12 books in one bag. He knows he has 7 fewer books in the other bag. He does not know how many books he has altogether.