How many numbers from 10 to 100 are exactly divisible by 9?  Pick one:  A) 7  B) 8  C) 10  D) 12  E) 14

Rationale: "option ' c ' 10 / 9 = 1 and 100 / 9 = 11 = = > 11 - 1 = 10 . therefore 10 digits ."
Answer: C