表$1:X^{2}=\dfrac{50\times \left(14\times 26-4\times 6\right)^{2}}{18\times 32\times 20\times 30}\approx 16.7$;
表$2:X^{2}=\dfrac{50\times \left(8\times 22-12\times 8\right)^{2}}{16\times 34\times 20\times 30}\approx 0.98$;
表$3:X^{2}=\dfrac{50\times \left(5\times 18-12\times 15\right)^{2}}{17\times 33\times 20\times 30}\approx 1.203$;
表$4:X^{2}=\dfrac{50\times \left(6\times 20-10\times 14\right)^{2}}{16\times 34\times 20\times 30}\approx 0.06$,
$\therefore $阅读量与性别有关联的可能性最大,
故选:$A$.