If the roots of the following quadratic equation exist,find them by the method of completing the square: $3x^2 + 7x + 5 = 0$.
- ARoots exist and are $x = \frac{-7 \pm \sqrt{11}}{6}$
- BRoots exist and are $x = \frac{-7 \pm \sqrt{11}}{3}$
- CRoots do not exist
- DRoots exist and are $x = \frac{-7 \pm \sqrt{11}}{2}$
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