If \( A, B, C \) are acute positive angles such that \( A+B+C= \) \( \pi \) and \( \cot A \cot B...

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If \( A, B, C \) are acute positive angles such that \( A+B+C= \) \( \pi \) and \( \cot A \cot B \cot C=K \), then
(A) \( K \leq \frac{1}{3 \sqrt{3}} \)
(B) \( K \geq \frac{1}{3 \sqrt{3}} \)
(C) \( K\frac{1}{9} \)
(D) \( K\frac{1}{3} \)
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