Let an ellipse \( \dfrac{x^{2}}{a^{2}}+\dfrac{y^{2}}{b^{2}}=1 \), pass through the point (4, 3) and have eccentricity Then the length of its latus rectum is:
\( \dfrac{4\sqrt{5}}{3} \)
\( 2\sqrt{5} \)
\( \dfrac{7\sqrt{5}}{3} \)
\( \dfrac{8\sqrt{5}}{3} \)