If k is a non-negative integer and 12^k is a divisor of 856,736 then 3^k - k^3 =
Choose the correct answer:
A) 0
B) 1
C) 36
D) 120
E) 524

Rationale: "8 + 5 + 6 + 7 + 3 + 6 = 35 , so this number is not divisible by 3 and thus not divisible by 12 . therefore , k = 0 3 ^ k - k ^ 3 = 1 - 0 = 1 the answer is b ."
Answer: B