单选题 Which of the following experimental results, if observed, would most clearly contradict the findings of Victor Emmet?

A、 A left cutter like claw is removed in the fifth stage and a crusher claw develops on the right side.
B、 A left cutter like claw is removed in the fourth stage and a crusher claw develops on the left side.
C、 A left cutter like claw is removed in the six stage and a crusher-claw develops on the fight side.
D、 A left cutter like claw is removed in the fourth stage and a crusher claw develops on the right sid

【正确答案】 B

【答案解析】Victor Emmerg的发现是：如果在龙虾生长的第四或第五期弄掉它一只角的话，那么完好的那一只角就会成为crusher claw，而再生的就会成为cutter claw。但如果这发生在这一生长期之后，那么龙虾的已有结构就不会改变了。而B是与这一发现相违背的。所以正确答案为B。