If $m$ is the square of integer $n$ and $m$ is divisible by $98, m$ must also be divisible by:

If $m$ is the square of integer $n$ and $m$ is divisible by $98, m$ must also be divisible by:

I. $28$
II. $196$
III. $343$

(A) I only
(B) II only
(C) I & II only
(D) II & III only
(E) I, II, and III

Answer: C

Source: Manhattan GMAT

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