If n is a 27-digit positive integer, all of whose digits are the same,

If n is a 27-digit positive integer, all of whose digits are the same, which of the following must be true? I. n is divisible by 3 II. n is divisible by 9 III. n is divisible by 27 A. I only B. I and II only C. I and III only D. II and III only E. I, II and (…)