35. The Highest Common Factor of two unequal Positive integers a and b is 8. Which of the following must be true? I. The difference between a and b is divisible by 8 II. (a + b) is divisible by 16 III. ab is divisible by 64 A. III only B. I and II only C. I and III only D. II and III only E. I. II and III onlv