A student has taken twelve courses and received a B in a majority of them. The student is now taking another course and will probably, given her record, receive a B in it. Each of the following, if true, strengthens the argument EXCEPT: ['The student previously studied alone but is receiving help from several outstanding students during the present course.', 'The current course is a continuation of one of the twelve courses in which the student received a B.', 'The student previously studied in the library and continues to do so.', 'The student received a B in all but one of the twelve courses.']