On dividing 123 by a number, the quotient is 7 and the remainder is 4. Find the divisor.
Choose the correct answer:
A) 15 B) 16 C) 17 D) 18 E) 19

Rationale: "d = ( d - r ) / q = ( 123 - 4 ) / 7 = 119 / 7 = 17 c"
Answer: C