The term A, B or C can refer to a variety of things. In the context of a crossword puzzle, it could refer to a GRADE, LETTER, NOTE, or multiple choice. A GRADE is a 5-LETTER word that is used to indicate the level of quality of a student's work. A LETTER is a 6-LETTER word that is used to communicate information between two people. A NOTE is a 4-LETTER word that is used to make a brief written record of something. Finally, multiple choice is a 14-LETTER word that is used to describe a type of test question in which the respondent must choose one answer from a list of possible answers.