A level writing is rare, because it shows consistent excellence. A level writing always surpasses assignment expectations. Not all students who achieve a fine performance receive an A. B represents solid, readable writing that does what the assignment asks. B level writing demonstrates concrete support for claims, fine organization, and substantive thoughtfulness, but it is not rich in specific detail or style. B level writing is free of grammatical problems or careless mistakes.
C represents writing which probably satisfies all the requirements of an assignment.
However, such writing lacks sufficient, concrete support needed to illustrate its assertions or prove its point. C level writing also shows lapses in editing proficiency and contains careless errors.