84. Whether she likes the play or not is a matter of her _______ preference. Which of the following cannot be put in the blank?

A．personal

B．private

C．own

D．Self

如图所示，SA、SB是光源S发出的两条光线。其中SA平行于主光轴，SB过左焦点，请画出这两条光线通过凸透镜后的光线。