If k^3 is divisible by 336, what is the least possible value of integer k? Select the correct option
A) 56	B) 70	C) 84	D) 96	E) 120

Rationale: "k ^ 3 = 336 * x = 2 ^ 4 * 3 * 7 * x the factors of k must at minimum include 2 ^ 2 * 3 * 7 = 84 . the answer is c ."
Answer: C