Rationalise the denominator of the following:
$\frac{2}{3 \sqrt{3}}$
$\frac{2}{3 \sqrt{3}}$
- A$\frac{2 \sqrt{5}}{7}$
- B$\frac{6 \sqrt{7}}{9}$
- C$\frac{5 \sqrt{3}}{9}$
- D$\frac{2 \sqrt{3}}{9}$
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