On dividing 109 by a number, the quotient is 9 and the remainder is 1. Find the divisor.  Choose the correct choice from the following answers: A) 10 B) 11 C) 12 D) 13 E) 15

Rationale: "d = ( d - r ) / q = ( 109 - 1 ) / 9 = 108 / 9 = 12 c"
Answer: C