Which of the following is true about the Moody's rating agencies? a. It is the smallest credit rating agency armong the "Big Three" agencies b. It is the oldest credit rating agency. c. Moody's rafings uses numbers; the number 1 indioates that the obligation is rarked at the higher end of the rating category, 2 indicates a mid-range ranking, and 3 indicates the lower and of the rating calegory d. It is not accredited by NRSRO