"Grade inflation," where assigned grades creep higher and higher, is a concern for teachers. What's the logical limit of grade inflation? F - Student appears to be a multicellular organism. D - Student has mastered many autonomic bodily functions. C - Student can operate a writing instrument without harming self or others. B - Student is able to form a complete sentence, on the second or third try. A - Student has marginal to excellent understanding of the course material.