On dividing 136 by a number, the quotient is 9 and the remainder is 1. Find the divisor?  Choose the correct choice from the following.
A) 12  B) 15  C) 16  D) 17  E) 18

Rationale: "d = ( d - r ) / q = ( 136 - 1 ) / 9 = 135 / 9 = 15 b )"
Answer: B