In a division sum, the remainder is 0. As student mistook the divisor by 12 instead of 21 and obtained 70 as quotient. What is the correct quotient ? Choose the correct choice: A) 0 B) 12 C) 13 D) 40 E) 25

Rationale: "12 * 70 = 840 840 % 21 = 40 answer : d"
Answer: D