If one of the roots of the equation $3x^{2} + 2kx - 3 = 0$ is $-\frac{1}{2}$,then find the value of $k$.
- A$\frac{12}{4}$
- B$-\frac{9}{4}$
- C$-\frac{9}{3}$
- D$-\frac{7}{5}$
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