On dividing 23 by a number, the quotient is 4 and the remainder is 3. Find the divisor.  Choose the correct choice from the following answers:  A) 1  B) 2  C) 4  D) 5  E) 7

Rationale: "d = ( d - r ) / q = ( 23 - 3 ) / 4 = 20 / 4 = 5 d"
Answer: D