The term A OR C can be solved in a crossword puzzle with the answers GRADE and VITAMIN. GRADE is a 5-letter word that is used to describe the quality of something, such as a student's performance in school or the quality of a product. VITAMIN is a 7-letter word that refers to a group of organic compounds that are essential for normal growth and nutrition. Vitamins are found in food and are necessary for the body to function properly.