如图4所示，两个底面积不同的圆柱形容器内分别盛有深度不同的液体，已知距容器底部均为h的A、B两点的压强相等。现将实心金属球甲、乙分别浸没在左右两液体中，均无液体溢出，此时A点的压强大于B点的压强，则一定成立的是····························································································································· (   )

A  甲球的质量小于乙球的质量。       B  甲球的质量大于乙球的质量。

C  甲球的体积小于乙球的体积。       D  甲球的体积大于乙球的体积。